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metal uhf rfid tag simulation


hi to my friendsi am simulating a uhf rfid tag,layout is like:///pet(0.5mm)///metal(0.018mm)///pet(4mm)///metal(0.018)reflect layout///pet(0.05)port setting:p1:internal port(14+j144)p2:ground ref(associate with p1)s(1,1):fre:914mhzimp:z0*(1.013+j0.06...
RF, Microwave, Antennas and Optics :: 07 Nov 2009 7:14 :: wforest6810 :: Replies: 0 :: Views: 51

433 mhz passive rfid system design, rfid, tag, reader,antena


hey. is it possible to have a long range passive rfid system designed ? i am working with a 433 mhz carrier frequency and the system has to be passive, am using inductive coupling, lc resonant, i.e. an inductor l with a resonant capacitor c and the o...
RF, Microwave, Antennas and Optics :: 03 Nov 2009 23:27 :: FvM :: Replies: 1 :: Views: 150

lf,hf,uhf rfid tags manufacturer - simple technology


simple technology, inc.(sti) has involved in creating and designing low-cost commercial rfid tag products for the last three years as well as the development of rf modules. sti owns a first-class rfid product design house in las vegas, nevada and a l...
Electromagnetic Design and Simulation :: 21 Oct 2009 6:18 :: simpleRFID :: Replies: 0 :: Views: 123

rfid ,reader,frequency ,compact,writer


toronto, canada – gao rfid asset tracking (www.gaorfidassettracking.com) has released its 13.56mhz rfid reader/writer, a compact flash device designed to read and write mifare mf1 tags. this optimized rfid reader is commonly used for logistics, guard...
EDA Jobs, Promotions, Advertising :: 07 Oct 2009 4:02 :: gaorfidasset :: Replies: 0 :: Views: 144

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need system architecture bom for the uhf rfid reader module


can anyone share the system architecture and bom for the uhf rfid reader module (866 - 868 mhz) ? sandeep...
Electromagnetic Design and Simulation :: 22 Sep 2009 4:48 :: vedagarbhamsandeep :: Replies: 2 :: Views: 192

uhf 434mhz patch antenna hfss design example


hi,i search an example of basic project of uhf rfid antenna in hfss(868mhz).could you help me...
Electromagnetic Design and Simulation :: 21 Aug 2009 11:56 :: mano_apt :: Replies: 6 :: Views: 941

how to design a magnetic near field microstrip antenna


hi. i am currently designing an antenna that needs to have a high magnetic field strength. is there any specific features or golden rule that i need to follow on to get something out? thanks in advance....
RF, Microwave, Antennas and Optics :: 13 Aug 2009 13:25 :: ntstatic :: Replies: 5 :: Views: 565

how does passive tag receive energy


hi everyone,i have a question regarding energy harvest on a passive tag. i am wondering how does the tag translate the information that send by the reader into energy and able to use the. i know that there are rectifier and a limiter circuit in any p...
RF, Microwave, Antennas and Optics :: 13 Aug 2009 13:20 :: ntstatic :: Replies: 5 :: Views: 825

gain of a usual rfid tag antenna for 900 mhz


hello,whats the gain of a usual rfid tag antenna for 900 mhz?...
RF, Microwave, Antennas and Optics :: 13 Aug 2009 12:07 :: ntstatic :: Replies: 2 :: Views: 261

rfid project


i am building an integrated rfid system capable of quickly identifying objects by their rfid tags. the system will be able to read and write tags. read data will be store in a database through a middleware.i intend this system to be installed in libr...
Microcontrollers :: 09 Aug 2009 1:16 :: doraemon :: Replies: 10 :: Views: 1773

printed circuit board antenna / symetrical radiation pattern


hello everybody,does anybody already designed a pcb antenna that has a radiation pattern that is symmetrical in the xy plane. in other words, when the antenna lays on the floor itll radiate with the same gain in the polar coordinates r-θ-φ ...
RF, Microwave, Antennas and Optics :: 23 Jul 2009 11:17 :: jabidof :: Replies: 6 :: Views: 399

power levels for 868 mhz ism band - in which en etsi spec?


hello!does anybody know in which en or etsi spec the different power levels, channel bandwidth etc. are specified for a device in the 868 mhz ism band?i have etsi 300220-1 and 300220-2 here, but that specifies only other limits and testing for that d...
RF, Microwave, Antennas and Optics :: 22 Jul 2009 11:19 :: multanova51 :: Replies: 9 :: Views: 945

868 mhz patch antena design for library


plz any one help me for design...
RF, Microwave, Antennas and Optics :: 15 Jul 2009 9:21 :: dong86 :: Replies: 8 :: Views: 973

uhf rfid module for help!


hi all,i have designed a module with impinj r1000,i used this chip on my fixed rfid reader and the read range is very good.but now,my handheld just read 1 meter with 3 dbi ceramic patch antenna, because of the physically bulky size of the circulator...
RF, Microwave, Antennas and Optics :: 05 Jul 2009 15:14 :: hylinuxer :: Replies: 0 :: Views: 204

measurring rfid system - connecting tag to signal analyzer


hello everyone,i am doing my work training and my task is to learn how to use a newly bought exa signal analyzer to carryout some measurement on rfid system. but the problem is i dont know how to connect the tag and reader system to the signal analyz...
Digital communication :: 03 Jul 2009 7:35 :: FvM :: Replies: 5 :: Views: 334

semi-passive uhf rfid tag and reader design


hi,im a student and i have to design a project.i started to study passive uhf rfid two weeks ago but i realized that passive uhf rfid distance is too short for my project so i decided to design semi-passive uhf rfid tag and reader. i need some advice...
RF, Microwave, Antennas and Optics :: 26 Jun 2009 12:52 :: MuCiT :: Replies: 0 :: Views: 141

rfid antenna


hi,i search an example of basic project of uhf rfid antenna in hfss.could you help memarzio...
Electromagnetic Design and Simulation :: 04 Jun 2009 1:11 :: brumi :: Replies: 1 :: Views: 615

need an example of basic project of uhf rfid antenna in hfss


hi,i search an example of basic project of uhf rfid antenna in hfss.help me...
Electromagnetic Design and Simulation :: 04 Jun 2009 1:09 :: brumi :: Replies: 2 :: Views: 417

gen 2 passive tag for on-metal use


toronto, canada - gao rfid inc. (www.gaorfid.com) offers this compact uhf gen 2 passive tag (gao116405), which is meant for accurate identification for use on metal objects. the tag is light-weight with a durable housing and industry leading on-metal...
EDA Jobs, Promotions, Advertising :: 01 Jun 2009 4:54 :: gaorfid1 :: Replies: 0 :: Views: 189

passive uhf rfid reader design


hi,im a student and i want to design a passive uhf rfid reader but i dont know anything about uhf rfid reader. i need some advices. where should i start?...
RF, Microwave, Antennas and Optics :: 30 May 2009 10:41 :: arefeidi :: Replies: 1 :: Views: 462

rfid signal strength measurement


colleagues,how difficult is it to measure signal strength of an rfid tag with a given code in presence of other tags? if there an existing signal structure where it would be easy to do? i would appreciate any references on this subject.thank you,- ...
RF, Microwave, Antennas and Optics :: 29 May 2009 1:55 :: kender :: Replies: 4 :: Views: 627

need example of basic project of uhf rfid antenna in hfss


hi,i search an example of basic project of uhf rfid antenna in hfss(868mhz).could you help memail:mano_apt@yahoo.fr...
Electromagnetic Design and Simulation :: 25 May 2009 14:11 :: mano_apt :: Replies: 0 :: Views: 234

daily unveils customized rfid label


rfid label is in the ascendant as a result of its long lifespan, easy use and most of all - its low cost, especially in supply chain management. daily rfid is excellent in producing and designing the rfid label, just like paper label, pvc label.the r...
Business Special Interest Group :: 18 May 2009 7:19 :: RFID_DAILY :: Replies: 0 :: Views: 263

usb enabled uhf mini rfid reader/writer announced by gao


toronto, canada – gao tek inc. (www.gaotek.com) has launched a small well equipped, mouse-sized rfid reader/writer (gao216008). the uhf rfid reader/writer is commonly used for verification and programming of rfid tags and labels, personnel iden...
EDA Jobs, Promotions, Advertising :: 16 May 2009 4:52 :: gaotek2009 :: Replies: 0 :: Views: 171

low-cost 13.56 mhz rfid reader features power supply by usb


daily rfid has recently launched a 13.56 mhz rfid reader -02 designed as a low cost plug-and-play device for industrial and outdoor environments, especially in process of writing data into passive rfid tags. daily plans to market the 13.56mhz reader ...
Business Special Interest Group :: 14 May 2009 8:05 :: RFID_DAILY :: Replies: 0 :: Views: 387

gao's usb enabled hf and uhf mini rfid readers/writers


- gao tek inc. (www.gaotek.com) is releasing its small yet full featured mouse-sized rfid readers/writers (gao223015) and gao216008) which are designed for the desk-top use and are available for both uhf and hf rfid frequencies. these hf and uhf rfid...
EDA Jobs, Promotions, Advertising :: 12 May 2009 2:51 :: gaotek2009 :: Replies: 0 :: Views: 141

gen 2 rfid tag for on metal surface unveiled by daily


daily rfid has unveiled gen 2 rfid tag for on metal surface, which can be operate normally in applications directly on metallic surfaces. this gen 2 rfid tag is suitable for tagging on metal surface with good accuracy even under the harsh environment...
Business Special Interest Group :: 09 May 2009 6:36 :: RFID_DAILY :: Replies: 0 :: Views: 301

daily's rfid wristband is suited for unlimited application


daily rfid has developed rfid wristband series that are suited for unlimited application, such as healthcare environment, amusement parking and event. the rfid wristband is available in women, man or children size.the all-purpose rfid wristband can p...
Business Special Interest Group :: 09 May 2009 6:35 :: RFID_DAILY :: Replies: 0 :: Views: 272

gao's new gen 2 rfid laundry tag


toronto, canada - gao tek inc.(www.gaotek.com) recommends its gen 2 rfid laundry tag(gao116413), which is designed specifically for laundry applications that require a rugged rfid transponder that can withstand harsh environments. this passive rfid t...
EDA Jobs, Promotions, Advertising :: 06 May 2009 4:11 :: gaotek2009 :: Replies: 0 :: Views: 147

return loss transmit power adjustment


hii have 2 questions about a monostatic (single antenna) uhf rfid system. for example:(1) if i have an antenna with 20 db return loss and the output power of the transmitter is 30 dbm, then only +20 dbm will be radiated. if the desired radiation powe...
RF, Microwave, Antennas and Optics :: 30 Apr 2009 17:38 :: jancambodia :: Replies: 0 :: Views: 150

uhf gen 2 rfid reader with double antenna channels


http://www.rfid-in-china.com/uploadfile/localhost/200812/20081216232518935.jpgdaily rfid has unveiled uhf gen 2 rfid reader dl6820 with double antenna channels and long read range up to 10m. with gen 2 rfid technology, this uhf reader promises multip...
Business Special Interest Group :: 30 Apr 2009 9:15 :: RFID_DAILY :: Replies: 0 :: Views: 324

passive rfid asset tracking solution from daily rfid


http://www.rfid-in-china.com/uploadfile/localhost/200904/2009042822243666.jpgdaily rfid has released passive rfid asset tracking solution, designed to track and manage mobile and fixed assets through automatic asset tracking. it can automatically kee...
Business Special Interest Group :: 29 Apr 2009 9:04 :: RFID_DAILY :: Replies: 0 :: Views: 300

low-power rfid tester for rfid test launched


http://www.rfid-in-china.com/uploadfile/localhost/200812/20081230230559445.jpgdaily rfid has released uhf rfid tester dl9600 specially for rfid test solution. as its low power consumption, this rfid tester is designed as a low-cost uhf reader to dete...
Business Special Interest Group :: 28 Apr 2009 10:34 :: RFID_DAILY :: Replies: 0 :: Views: 390

long-distance rfid reader offers read range up to 40 feet


process is always on look out for long range rfid readers which can improve overall productivity. daily rfid has unveiled globally-compliant long-distance rfid reader dl910 for rapid integration into uhf solution with a long read range up to 10m(33 f...
Business Special Interest Group :: 24 Apr 2009 7:19 :: RFID_DAILY :: Replies: 0 :: Views: 639

the high-quality rfid labels reshape supply chain management


http://www.rfid-in-china.com/uploadfile/localhost/200903/20090309224434269.jpgthe high-quality rfid labels are considered as an important element in rfid supply chain management. daily rfid has designed various adhesive rfid labels for supply chain m...
Business Special Interest Group :: 20 Apr 2009 8:03 :: RFID_DAILY :: Replies: 0 :: Views: 270

902mhz gen 2 alien mini s passive rfid bar code tag from gao


toronto, canada – gao tek inc. (www.gaotek.com) has launched its high performance uhf gen 2 passive rfid bar code tag (gao116009), an rfid tag which provides rapid and reliable item identification and tracking capabilities. it is designed for h...
EDA Jobs, Promotions, Advertising :: 17 Apr 2009 10:26 :: gaotek2009 :: Replies: 0 :: Views: 225

rfid vehicle tracking system with high identification accura


http://www.rfid-in-china.com/uploadfile/localhost/200812/20081209235952295.jpgdaily rfid has released rfid vehicle tracking system with high identification accuracy, designed to track and manage vehicles in parking areas or gated communities. this rf...
Business Special Interest Group :: 15 Apr 2009 4:38 :: RFID_DAILY :: Replies: 0 :: Views: 396

high performance uhf gen 2 rfid reader


toronto, canada - gao tek inc. (www.gaotek.com) recommends this latest uhf gen 2 rfid reader (gao216004). the uhf rfid reader is a high performance device designed for applications requiring a large number of tags and two or more antennas. it support...
EDA Jobs, Promotions, Advertising :: 13 Apr 2009 5:00 :: gaotek2009 :: Replies: 0 :: Views: 189

rfid warehouse: compact uhf rfid reader improves efficiency


0812/20081216232701719.jpgmore and more enterprises and shops integrate rfid into the warehouse management system, as the high roi of rfid in the warehouse mangement. daily rfid has recently released uhf rfid reader dl910, specially designed for ware...
Business Special Interest Group :: 10 Apr 2009 10:00 :: RFID_DAILY :: Replies: 0 :: Views: 399

carrier suppression uhf rfid


hiin uhf rfid 3 modulation types are used from reader to tag:ssb-askdsb-askpr-askfor ssb a carrier is added, but what about dsb-ask. when a continuous wave is ask modulated, two sidebands are created. is the carrier suppressed in this way, since only...
RF, Microwave, Antennas and Optics :: 01 Apr 2009 19:42 :: FvM :: Replies: 1 :: Views: 132

rfid antenna - current ditribution or conduction current


hello to all!i am researching antenna design for uhf rfid tag with ads momentum.everyone can help me how to determine current ditribution or conduction current over surface antenna or send me any related documents .thank you very much!...
RF, Microwave, Antennas and Optics :: 19 Mar 2009 3:37 :: peter_09 :: Replies: 0 :: Views: 300

rfid tag measurements


hello to all!!what is the best method for measuring rfid passive tags for uhf?the tags dont include the chips.how should i measure a back-scattering from an rfid tag (without the chip)?the measurements should be in tne physical layer. (em wave scatte...
RF, Microwave, Antennas and Optics :: 16 Mar 2009 4:21 :: marcz3333 :: Replies: 32 :: Views: 2304

rfid reader schematic


im about to build one low cost rfid reader for my finaly year project. however i cant find many source of the circuit to try out and compare the best design. does anyone can help me on this?thank you....
Professional Hardware and Electronics Design :: 15 Mar 2009 16:57 :: siongboon :: Replies: 5 :: Views: 1533

ansoft designer - need help


i am currently trying to simulate a small loop rfid receiver antenna on uhf for near field. i have never tried ansoft designer so i realli wish someone could help me to startup my simulation. for example what to choose for the layout technolody. besi...
Electromagnetic Design and Simulation :: 11 Mar 2009 7:39 :: marcz3333 :: Replies: 8 :: Views: 744

attenuator in uhf rfid - need explanation


helloat the moment im working as a student on the development of an uhf rfid system for my graduation project. as a reference design i use the r1000 development kit from intel which includes the r1000 transceiver chip. to get more knowledge i studie...
RF, Microwave, Antennas and Optics :: 10 Mar 2009 9:49 :: jancambodia :: Replies: 0 :: Views: 159

epc gen2 can single tag can be accessed by multiple readers


hi,can two interrogators access a single tag at the same time.??according to epc tag will have ability to store 2 rn16s. so if a tag receives req_rn from two interrogators will it be able to send different rn16s. by using different sessions and inven...
RF, Microwave, Antennas and Optics :: 14 Feb 2009 14:23 :: Aya2002 :: Replies: 10 :: Views: 339

uhf rfid tag simulation sample


hi,i am new to antenna simulation and am looking for a tutorial on uhf rfid tag simulation using hfss.in particular, i am looking for a tutorial that demonstrates how to model the antenna, the ic impedance and the kind of port modeling i need to use....
RF, Microwave, Antennas and Optics :: 26 Jan 2009 18:24 :: rahul1782 :: Replies: 0 :: Views: 390

need help on microstrip dipole antenna for uhf rfid tag


hi,all im working on a project about designing of uhf rfid tag antenna, ive searched many articles,but few were found on microstrip dipole antenna, lots of dipoles antenna are not the type of microstrip. because we hope the back of the antenna is me...
RF, Microwave, Antennas and Optics :: 08 Nov 2008 5:16 :: Abhishekabs :: Replies: 5 :: Views: 609

dc_dc charge pump in rfid tag


hi,all: the usual architecture of dc_dc is dickson,but if the ckl is connected with dc_dc by buffer(inverter),the average current is so large.how to deal with it?thanks all so much.by the way ,a charge-pump circuit converts the dc supply voltage ...
Analog Circuit Design :: 30 Oct 2008 4:10 :: berryfan :: Replies: 2 :: Views: 324

rfid issue


hii am fully aware that rfid transmit high speed data but for my cast, i simply want to use it for on and off. i have looked at catalogues and most of them offer complex system with usb/rs232 connection. i simply need a simple rfid detector that de...
Electronic Elementary Questions :: 16 Oct 2008 9:02 :: sohailkhanonline :: Replies: 2 :: Views: 246

question on tx-rx leak in uhf rfid reader


hi,everyone!this is my first post here.thanks for your attention.here goes my confusion. in the uhf rfid reader, there would be a circuloator or directional couplerwhich isolates the tx from rx.however the isolation would be 30db as a reasonable...
RF, Microwave, Antennas and Optics :: 26 Sep 2008 12:52 :: francisxu :: Replies: 0 :: Views: 99

uhf rfid demodulated frequecy


hi everyone,may i know anyone knows what is the demodulated frequency for uhf rfid? (which is typically 900mhz)is it few khz to few mhz? anyone knows the more accurate answers?thanks for your helps!!!regards :d...
RF, Microwave, Antennas and Optics :: 08 Sep 2008 12:35 :: FvM :: Replies: 5 :: Views: 252

rfid uhf


is there any rfid ic which can support uhf is in the market? as i know intels r1000 has all the functions but not sure on its price. by the way, you guys have any suggestion for rfid uhf reader ic.thanks all please reply to viknes1985@hotmail.com...
Microcontrollers :: 03 Sep 2008 15:50 :: viknes1985 :: Replies: 0 :: Views: 192

a wireless device with strain gauge


hey guys,i need help to settle my final year project..this is a periodontal probe (measuring tooth gum) which utilizes strain gauge to standardize the force applied to patients gummy fyps objective is to make it wireless (from the strain gauge attach...
RF, Microwave, Antennas and Optics :: 25 Aug 2008 10:43 :: biff44 :: Replies: 4 :: Views: 324

50ohm uhf antenna for handheld device


i have to design a 50 ohm uhf antenna for rfid reader module that will be imbedded in hand held device. this antenna need to be as small as it is possible.so, could you help me, what should i pay attention for? what to start with?thanks a lot)...
RF, Microwave, Antennas and Optics :: 05 Jul 2008 23:06 :: RF-OM :: Replies: 8 :: Views: 531

s parameters & simulator


hi all,i am designing a loop antenna (for magnetic field) ,i am measuring its performance by measuring coupling s21 with a second antenna of same type kept at a distance. i want to know whether my approch is right.my doubt is s parameter calculations...
RF, Microwave, Antennas and Optics :: 05 Jul 2008 0:14 :: RF-OM :: Replies: 12 :: Views: 726

r1000 intel rfid reader


hii neeed any doc. about this chip and application.can you help me?thanks a lot.edson...
Professional Hardware and Electronics Design :: 24 Jun 2008 12:33 :: edsonmoky :: Replies: 4 :: Views: 636

rfid tag vendor request...


hello to all!can someone tell me what is the protocol of the given rfid tag (label) as shown in attached picture? (e.g. epcglobal class 1 gen 2)i know that its from tyco and m/a-com. does the same antenna (tag/label) might be manufactured by other ve...
RF, Microwave, Antennas and Optics :: 24 Jun 2008 8:24 :: zirtapoz :: Replies: 3 :: Views: 291

uhf rfid reader antenna for hand held applications


i am developing a reader module antenna 900mhz band (860-930mhz) which should typically have a gain of around 3 db or so. a microstrip patch is larger and may not be suitable for the application. prefer to use pifa and anybody can suggest a better s...
RF, Microwave, Antennas and Optics :: 16 Jun 2008 7:47 :: mission :: Replies: 11 :: Views: 726

hfss tutorials including antenna


...
Electromagnetic Design and Simulation :: 13 Jun 2008 21:57 :: ikki7 :: Replies: 16 :: Views: 1402

impedance matching. antenna simulation


i need to match my antenna to an impedance of 48 - j 148 ohms. (microchip impedance). so the conjugate of that should be my antenna impedance. how to measure this ? usually we have 50 ohm system and we use a 50 ohm port .can we use a 48 ohm port in s...
RF, Microwave, Antennas and Optics :: 10 Jun 2008 12:59 :: zirtapoz :: Replies: 7 :: Views: 741

am/ask demodulation in rfid-reader


hi,ive got a amplitude modulated signal which comes from a rfid transponder, which after doing some filtering looks similar to the one on the attached picture. this signal is sampled with the help of an analog/digital converter (sample frequency 80kh...
Digital Signal Processing :: 01 Jun 2008 14:50 :: FvM :: Replies: 5 :: Views: 633

rfid


i am making a projecton rfid.i need some information on it....
RF, Microwave, Antennas and Optics :: 14 May 2008 5:54 :: fxxjssc :: Replies: 6 :: Views: 798

antenna design for rfid uhf system


dear all,i am working on a rfid project for scm.i have taken up a chellenge to design a directional antenna so that i can scan the goods moving out of a gate (aprox 3 meters wide).i am new to rf field and i do realise this is not a right point to ent...
RF, Microwave, Antennas and Optics :: 15 Apr 2008 12:45 :: viswanathan.balaraman :: Replies: 1 :: Views: 300

what is the rfid?


what is the rfid?what is a simple example?how to push it into a cheap productions?tia...
RF, Microwave, Antennas and Optics :: 03 Apr 2008 6:45 :: kokei74 :: Replies: 20 :: Views: 1533

what is near field antenna?


hi, can anyone kindly tell me what is near field antenna ?thanks in advance.best regardsxcy_antenna...
RF, Microwave, Antennas and Optics :: 25 Mar 2008 20:55 :: zirtapoz :: Replies: 7 :: Views: 300

info on rfid antenna


need reference books for rfid antenna design.is any book available in this forum regarding rfid antenna design?advance thanks....
RF, Microwave, Antennas and Optics :: 25 Mar 2008 17:33 :: streamlet :: Replies: 9 :: Views: 432

rat race coupler: improving isolation by mismatching?


hi,ive got a rat race coupler like this one for ~900mhz on microstrip line which im using it to isolate the transmitter signal from the received signal.http://www1.sphere.ne.jp/i-lab/ilab/kairo/k7/gr7_8.gifconnections are as following:a - transmitter...
RF, Microwave, Antennas and Optics :: 21 Mar 2008 13:20 :: ecapso :: Replies: 19 :: Views: 567

rfid: backscattering question


hey guys,im doing the project of kind of sensor which might employ the wireless stuff, currently i dont really get the idea of backscattering, why and how we discuss about that? how to regulate the input dc level of rfid seems to be really interestin...
RF, Microwave, Antennas and Optics :: 13 Feb 2008 12:38 :: Alex0131 :: Replies: 2 :: Views: 483

rfid [help]


hii want to know about rfid. pls hlp me. what is its fundamentals? which frequency bands are used for it? which books are about it?...
RF, Microwave, Antennas and Optics :: 01 Feb 2008 14:01 :: zirtapoz :: Replies: 3 :: Views: 212


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