Zvigadzirwa

  • ASTMD 2299 & en149 Dual-Channel Kuzivisa Filtration Kubudirira Tester

    ASTMD 2299 & en149 Dual-Channel Kuzivisa Filtration Kubudirira Tester

    1.EQuipment Nhanganyaya:

    Inoshandiswa kukurumidza uye nekukwezva zvinhu zvakasiyana-siyana zvakashata, zvakadai segirazi fiber, ptfe, pet, pp lilt-blown composite yemhepo yekuisa faira rekushandisa, kushanda zvakanaka.

     

    Dhizaini yechigadzirwa inosangana nezviyero:

    GB 2626-2019 Dziviriro Rekuchengetedzwa, Kuzvinyudza Firita Anti-Resport Respirator :3 Filtration Kubudirira;

    GB / T 32610-2016 Technical Specution yeMasks Deals Conks Acomputer Sertration Kubudirira Kwekuedza Kuedza nzira;

    GB 19083-2010 -010 zvinodiwa zvekudzivirira masks ekurapa 5.4 Kubudirira kweFilt;

    YY 0469-2011 SEILLE SURGICAL MASKS 5.6.2 CHITSAUKO CHEMA ROKUSHAYA;

    GB 19082-2009 Kurapa Kuzvidzivirira Zvipfeko Zvekushandisa Technical Zvinodiwa Zvinotarisirwa 5.7 Kubudirira Kwekubudirira;

    En1822-3: 2012,

    En 149-2001,

    En14683-2005

    En1822-3: 2012 (Yakanyanya Kubata Mhepo Filter - Flat Filter Media Test)

    GB1982-2003 (Medical Kuraswa Zvipfeko Zvekudzivirira)

    GB2626-2019 (Kuzvimirira Firita Anti-Spurate Respiratorator)

    YY0469-2011 (Surgical Mask yeUchiremba Kushandisa)

    YY / T 0969-2013 (Kuraswa Mask)

    GB / T32610-2016 (Technical Specution yeMassion Dziviriro Masiki)

    ASTM D2299-Latex bhora aerosol bvunzo

     

  • YY268F yeKuita chiitiko cheFiltration Kubudirira Tester (kaviri Photometer)

    YY268F yeKuita chiitiko cheFiltration Kubudirira Tester (kaviri Photometer)

    Kushandiswa Kwekushandisa:

    Izvo zvinoshandiswa nekukurumidza, uye zvinoedza zvakanyatsonaka pakubata kwemaswiyo uye nemhepo zvinopesana nemasks akasiyana-siyana, zvinhu zvakadzika, zvakadai segirazi fiber, ptfe, pt

     

    Kusangana neyakajairwa:

    En 149-2001; en 143, en 14387, Niosh-42, CFR84

     

  • YY372F kufema kupokana kupesana tester en149

    YY372F kufema kupokana kupesana tester en149

    1. ChiridzwaZvishandiso:

    Izvo zvinoshandiswa kuyera kudzikisira kurwisa uye kudzikisira kudzikisira kwevadonhedza uye masks akasiyana siyana pasi pemamiriro akataurwa.

     

     

    Ii.Sangana nemwero:

    BS en 149-2001 -A1-2009 Dziviriro Dziviriro Zvekudzivirira - Zvinodiwa zveMafarefu hafu masks pamusoro pechiitiko chenyaya;

     

    GB 2626-2019 - Reserveriretory Kuchengetedza Midziyo Kuzvidzivirira Firita Anti-Respulate Respotator 6.5 Kukurudzira Kudzivisa 6.6 Kuwedzera kuramba;

    GB / T 32610-2016 -Technical Specution yeMasks Dudziro yezuva nezuva 6.7 Kukurudzira Kudzivisa 6.8 Kuwedzera kuramba;

    GB / T 19083-2010- Kudzivirira Kwekudzivirira Kwemakona ehunyanzvi

  • YYJ267 BATATRIAL FILTRATION EYFIENCY TESER

    YYJ267 BATATRIAL FILTRATION EYFIENCY TESER

    Kushandiswa Kwekushandisa:

    Iyo inoshandiswa kuona iyo bactial filt filt yemhedzisiro yemasakisi ekurapa uye zvigadzirwa zvemask nekukurumidza, nenzira kwayo uye zvine simba. Iyo dhizaini system yakavakirwa panzvimbo yekushanda yekumanikidzwa kweBiageffe cabinet inotorwa, iyo yakachengeteka uye yakakodzera kushandisa uye ine mhando dzinotambudza. Nzira yekufananidza sampling ine maviri gasi chiteshi panguva imwe chete yakakwira yekuona kugona uye sampling yechokwadi. Iyo yakakura skrini inogona kubata iyo mavara emuindasitiri ekurwisa skrini, uye inogona kudzorwa zviri nyore paunenge uchipfeka magurovhosi. Izvo zvakakodzera kwazvo kuyerwa madhipatimendi, zvesainzi yekutsvaga masisitiri, mask kugadzirwa uye mamwe madhipatimendi akakodzera kuti aedze kuita kweask bacterial filtration.

    Kusangana neyakajairwa:

    YY0469-2011;

    ASTMF2100;

    ASTMF2101;

    En14683;

  • YYP-01 yekutanga Dhizsion Tester

    YYP-01 yekutanga Dhizsion Tester

     Chigadzirwa Chekutanga:

    Chekutanga chinoshambidza tester yyp-01 yakakodzera yekutanga kuyemura bvunzo yekuzvishambadzira, label, kudzvanywa tepi, iyo firimu, njanji, machira ezvigadzirwa uye zvimwe zvigadzirwa zvinonamira. Rudzi Rwakasimudzwa , mhando dzekuongorora masangano, zvinodhaka zvinodhaka masangano uye zvimwe zvikamu.

    Muedzo weyedzo

    Iyo inosimbisa nzvimbo inokanda bhora nzira yakashandiswa kuyedza iyo yekutanga viscosity yeiyo fungidziro yechigadzirwa pane iyo bhora resimbi kana iyo viscous pamusoro pechiitiko chechidimbu chakapfupika nekudyidzana kudiki.

  • YYP-06 Mhete Yekutanga Dhiziri Tester

    YYP-06 Mhete Yekutanga Dhiziri Tester

    Chigadzirwa Chekutanga:

    YYP-06 Mhete Yekutanga Dhizino Tester, yakakodzera kuzvinamatira, Label, tepi, firimu rekudzivirira uye kumwe kunamatira kwekutanga kudiwa kwekukosha. Yakasiyana neiyo Steel Ball nzira, iyo CNH-06 Mhete Yekutanga viscosity tester inogona kuyera kunyatso kuyera iyo yekutanga viscosity kukosha kweManistity. Nekushongedzerwa nekukasira kunze kwenyoreso

    Hunhu hwechigadzirwa:

    1. Muchina wekuedzwa unobatanidza dzakasiyana siyana dzebvunzo dzakazvimiririra dzakadai seinetsika, dzakabvaruka uye nekubvarura, kupa vashandisi vane zvinhu zvakasiyana siyana zvekutarisa kusarudza kubva

    2. Computer Kudzora System, microcomputer control system inogona kuchinjiswa

    3. Stepless Spect Kugadziriswa Kwekudzidzira bvunzo, inogona kuwana 5-500mm / min bvunzo

    4. Microcomputer Control, menyu interface, 7 inch yakakura kubata skrini kuratidza.

    5. Akangwara gadziriso yakadai sekudzivirirwa

    6. Ne paramende yekuisa, kudhinda, kuona, kujekesa, calibration uye mamwe mabasa

    7. Professional control software inopa akasiyana mabasa akadai sekuongororwa kwehuwandu hwemasampuli eboka, kuongororwa kwepamhepo kweyedzo curves, uye kuenzanisa kwedata rezvakaitika kare

    8. Iyo Mhete Yekutanga Viscosity Tester ine Professional Test Software, Standard Rs.232

  • YYP-6S Adhishenion Tester

    YYP-6S Adhishenion Tester

    Chigadzirwa Chekutanga:

    YYP-6S SLICKINGY TESER inokodzera kuyedzwa bvunzo yemubhadharo wakasiyana-siyana wekuzvininipisa, anoshambidza tepi, kuva ne tepi, label paste uye zvimwe zvigadzirwa.

    Hunhu hwechigadzirwa:

    1. Ipa nguva nzira, nzira yekuburitsa uye imwe nzira bvunzo

    2. Iyo test board uye zviyero zveyedzo zvakagadzirirwa zvakanyatsoenderana neiyo Standard (GB / T4851-2014) Astm D3654 Kuve nechokwadi che data chaiyo

    3. Otomatiki nguva, inductive yakakura nzvimbo sensor yekukurumidza kuvhara uye mamwe mabasa kuti awedzere kuve nechokwadi

    4

    5. Tsigira yakawanda-level mushandisi kodzero yekutonga, inogona kuchengeta mapoka mazana mashanu eyeti yeTest data, yakanakira vashandisi statistics query

    6. Mapoka matanhatu ezviteshi zvebvunzo anogona kuedzwa panguva imwe chete kana mumanzvimbo yakatarwa zvigaro zvekushanda zvinehungwaru

    7. Otomatiki kudhinda kweyedzo mhinduro mushure mekupera kwebvunzo neyekupedzisira printer, yakanyanya kuvimbika data

    8. Otomatiki nguva, akangwara kukiya uye mamwe mabasa anozove nechokwadi chekurongeka kwakanyanya kwemibvunzo yebvunzo

    Muedzo weyedzo:

    Kurema kwendima yekubvunzwa kweyekuyera ndiro neyemushori emafungiro anorembera pasherufu yekuedzwa, uye uremu hwesimbe hwekupedzisira hunoshandiswa pakutungamirwa kwemuenzaniso mushure meimwe nguva, kana nguva yemuenzaniso yakazara yakaparadzaniswa kumiririra kugona kwekunamatira kufungidzira kuramba kubviswa.

  • YYP-L-200n Electronic Stuipping Tester

    YYP-L-200n Electronic Stuipping Tester

    Chigadzirwa Nhungamidzo:   

    YYP-L-200n Electronic Kuedza Machine yakakodzera kubviswa, kuveura, kupwanywa uye kuunganidza firimu, bhegi rakarukwa, firimu, pepa, pepa, rutakuri mutakuri zvigadzirwa.

     

    Zvigadzirwa zvechigadzirwa:

    1. Muchina wekuedzwa unobatanidza dzakasiyana siyana dzebvunzo dzakazvimiririra dzakadai seinetsika, dzakabvaruka uye nekubvarura, kupa vashandisi vane zvinhu zvakasiyana siyana zvekutarisa kusarudza kubva

    2. Computer Kudzora System, microcomputer control system inogona kuchinjiswa

    3. Stepless Speed ​​Kugadziriswa Kwekudzokorora kwekutanga, inogona kuwana 1-500mm / min bvunzo

    4. Microcomputer Control, menyu interface, 7 inch yakakura kubata skrini kuratidza.

    5. Akangwara gadziriso yakadai sekudzivirirwa

    6. Ne paramende yekuisa, kudhinda, kuona, kujekesa, calibration uye mamwe mabasa

    7. Professional control software inopa akasiyana mabasa akadai sekuongororwa kwehuwandu hwemasampuli eboka, kuongororwa kwepamhepo kweyedzo curves, uye kuenzanisa kwedata rezvakaitika kare

    8. Iyo yemagetsi inoongororwa mess

     

  • YYP-LH-B Rheometer (Cure Tester)

    YYP-LH-B Rheometer (Cure Tester)

    Musangano wekusangana:

    Standard: GB / T3709-2003. GB / T 16584. ASTM D 5289. Iso-6502;

    Jis k6300-2001

  • Yy-st01a inopisa chisimbiso tester

    Yy-st01a inopisa chisimbiso tester

    1. Chigadzirwa Chekutanga:

    Iyo inopisa inosimbisa testinter inogamuchira inopisa yekushambadzira nzira yekuisa tembiricha yekupisa, inopisa inosungwa neyepurasitiki yefirimu substrate firimu, yakachinjika mapepa uye mamwe kupisa kusimbisa firimu. Icho chinhu chisingarurirwe chebvunzo mubhadharo muLaboratori, tsika yekutsvaga uye kugadzirwa kwepamhepo.

     

    Ii.Technical parameter

     

    Chinhu Paramende
    Inopisa inosanganisira tembiricha Indoor tembiricha + 8 ℃ ~ 300 ℃
    Inopisa chisimbiso yekumanikidzwa 50 ~ 700KPA (zvinoenderana neyekupisa chisimbiso chesimba)
    Inopisa laling nguva 0.1 ~ 999.9s
    Tembiricha kudzora chokwadi ± 0.2 ℃
    Tembiricha Yenyama ± 1 ℃
    Kuparadza fomu Kupisa kaviri (kunogona kudzora zvakasiyana)
    Inopisa sealing nzvimbo 330 mm * 10 mm (inobatsira)
    Simba Ac 220v 50hz / ac 120v 60 Hz
    Mhepo source kumanikidza 0.7 MPA ~ 0.8 MPA (iyo mhepo sosi yakagadzirirwa nevashandisi)
    Kubatana kwemhepo Ф6 mm polyurethane tube
    Dimension 400mm (l) * 320 mm (w) * 400 mm (h)
    Fungidziro net uremu 40kg

     

  • Yypl6-t2 tapi yakajairwa handheet yaimbova

    Yypl6-t2 tapi yakajairwa handheet yaimbova

    Yypl6-T2 Handheet yaimbogadzirwa uye yakagadzirwa zvinoenderana neTapi T-205, T-221 & IOSO 5269-1 uye mamwe maitiro. Izvo zvakakodzera kutsvagisa uye kuyedza kwemapepu uye fiber yakanyorova fomu yekugadzira zvinhu. Mushure mezvinyorwa zvekugadzira zvekugadzira, pepa rekugadzira pepa. Iyo inopa yakajairika yekuedza data yekugadzira, kuongorora, kuongorora uye kutsva kwechigadzirwa chitsva. Iyo zvakare yakajairika yekugadzirira yekugadzirira midziyo yekudzidzisa uye yesainzi yekutsvaga kwechiedza chemakemikari indasitiri uye zvigadzirwa zvechiFileti musainzi yekutsvaga manhamba uye makwai.

     

  • Yypl6-t1 tapi stand standard handheet yaimbova

    Yypl6-t1 tapi stand standard handheet yaimbova

    YYLL6-T1 handheet yaimbogadzirwa uye yakagadzirwa zvichienderana neTapi T-205, T-221 & IOSO 5269-1 uye zvimwe zviyero. Izvo zvakakodzera kutsvagisa uye kuyedza kwemapepu uye fiber yakanyorova fomu yekugadzira zvinhu. Mushure mezvinyorwa zvekugadzira zvekugadzira, pepa rekugadzira pepa. Iyo inopa yakajairika yekuedza data yekugadzira, kuongorora, kuongorora uye kutsva kwechigadzirwa chitsva. Iyo zvakare yakajairika yekugadzirira yekugadzirira midziyo yekudzidzisa uye yesainzi yekutsvaga kwechiedza chemakemikari indasitiri uye zvigadzirwa zvechiFileti musainzi yekutsvaga manhamba uye makwai.

     

  • YYLL6-T Tappi yakajairwa handheet yaimbova

    YYLL6-T Tappi yakajairwa handheet yaimbova

    Yypl6-t Handeet yaimbogadzirwa uye yakagadzirwa zvinoenderana neTapi T-205, T-221 & Iso 5269-1 uye mamwe maitiro. Izvo zvakakodzera kutsvagisa uye kuyedza kwemapepu uye fiber yakanyorova fomu yekugadzira zvinhu. Mushure mezvinyorwa zvekugadzira zvekugadzira, pepa rekugadzira pepa. Iyo inopa yakajairika yekuedza data yekugadzira, kuongorora, kuongorora uye kutsva kwechigadzirwa chitsva. Iyo zvakare yakajairika yekugadzirira yekugadzirira midziyo yekudzidzisa uye yesainzi yekutsvaga kwechiedza chemakemikari indasitiri uye zvigadzirwa zvechiFileti musainzi yekutsvaga manhamba uye makwai.

     

     

     

  • YYP116-3 Canadian Standard Freeness Tester

    YYP116-3 Canadian Standard Freeness Tester

    Pfupiso:

    Iyo YYP116-3 Canadian Standard Freeness Tester inoshandiswa kuona huwandu hwekuregerera kwemvura kumiswa kwemvura, uye inotaurwa nepfungwa yehuremu (CSF). Iyo yekufa kweiyo filt inoratidza mamiriro eiyo fiber mushure mekurova kana kugeda. Chimbo chinopa kukosha kwekuyedzwa kwakakodzera kutonga kwekukuya kudhirowa pulp; Inogona zvakare kushandiswa zvakanyanya mumakemikari akasiyana emakemikari muchimiro chekurova uye kunatsa mvura yekufema kwemvura inoshanduka; Iyo inoratidza mamiriro epasi uye kuzvimba kweiyo fiber.

     

    Basa Rekushanda:

    Iyo Canadian Standard Freeness Inoreva Kubvisa Kwemvura Kwemvura Yemvura ine Zvemukati we (0.3 Vhoriyamu yemvura inoyerera kubva parutivi pombi yeiyo chiridzwa (ml). Chiridzwa chakagadzirwa nesimbi isina tsvina. Iyo Freeness Meter inosanganisira mvura yefaira yefaira uye yekuyera funnel neyechiyerera kuyerera, kukwira pane yakasarudzika bracket. Iyo mvura yefaira yakagadzirwa nesimbi isina tsvina, pasi pegwenzi iri pousus is simbi yesimbi simbi, yakabatana neshizha rakatsemuka rutivi rwepamhepo, rakasimba kune rumwe rutivi, iyo yepamusoro yekuvhara yakaiswa chisimbiso, vhura pasi pevhu, purp kunze. YYP116-3 yakajairika Freeness Tester zvinhu zvese zvakagadzirwa ne304 Stainless Simbi Chairo Chainching Machining, uye iyo Firita yakagadzirwa zvakanyatsogadzirwa zvinoenderana neTapi T227.

  • Yyp112 infrared online moisture mita

    Yyp112 infrared online moisture mita

    Basa guru:

    YYP112 Series Infrared Moisture Metres inogona kuenderera, chaiyo-nguva, kuyerwa kwepamhepo yezvinhu zvekunyorova.

     

    SUmmary:

    Pedyo-Infrared Online Kukura Kwekunyoroveswa uye Chekutanga Chishandiso Kuyera Kwemakunhuwa Wood, Fenicha Bhodhi, Chikamu che20cm-40cm chiratidzo, saka unyoro hwekuita zvigadziriso zvinodiwa.

  • Plastiki Flammability Tester UL94 (Bhatani Type)

    Plastiki Flammability Tester UL94 (Bhatani Type)

    Chigadzirwa Chekutanga

    Iyi tester yakakodzera kuyedzwa uye kuongorora hunhu hwekusvibisa hwepurasitiki zvinhu. Yakagadzirwa uye yakagadzirwa zvinoenderana nezvakakodzera zviwanikwa zveUnited States Inotakura kunze uye yakatwasuka inoongororwa pane mapurasitiki zvikamu zvemidziyo uye zvishandiso, uye zvakashongedzwa negesi kuyerera kwemamita kuti gadzirise saizi uye tora mota drame mode. Kushanda kwakareruka uye kwakachengeteka. Ichi chimbo chinogona kuongorora kupisa kwemidziyo kana mapurasitiki akadai se: V-0, V-1, V-2, HB, Giredhi.

     Musangano WezveMusangano

    UL94 "Kuedza Kuedza"

    GBT2408-2008 "Kutsunga kweChindair Om

    IEC60695-11-10 "Bvunzo Dzomoto"

    GB5169

  • Yyp-125L yakakwira tembiricha testicha kamuri

    Yyp-125L yakakwira tembiricha testicha kamuri

     

    Kutaurwa:

    1. Mhepo yekupa mode: kumanikidzwa kwemhepo yekupa kutenderera

    2. Tembiricha Range: RT ~ 200 ℃

    3. Tembiricha tembiricha: 3 ℃

    4. Tembiricha yekufananidza: 5 ℃% (hapana mutoro).

    5. Tembiricha yekuyera muviri: PT100 Type Thermal Rishance (yakaoma bhora)

    6. Mukati Bhokisi Zvinyorwa: 1.0mm kukakavara Stainless Simbi Simbi Plate

    7. Insulation Zvinyorwa: zvakanyanya kushanda kwakasimba Ultra-yakanaka insolis rusarura mvere

    8. Kudzora Mode: AC Contactor Kubuda

    9. Kudzvinyirira: yakakwira tembiricha rarber strip

    10. Zvishandiso: Simba tambo 1 m,

    11. Heater zvinhu: Shockproof Dynamic Anti-Collision Fin Heater (Nickel-chromium Alloy)

    13. Simba: 6.5KW

  • YYP-RV-RV-300ft HDT VITIAT

    YYP-RV-RV-300ft HDT VITIAT

    SUmarize:

    Kupararira kweVical uye Vica Softening Potures Tembiricha (HDT Vicat) inoshandiswa kuona iyo inopisa yekudziya tembiricha uye vica software tembiricha yemidziyo yakasiyana siyana Iyo inoshandiswa zvakanyanya mukugadzirwa, kutsvakwa uye kudzidzisa kwepurasitiki zvigadzirwa uye zvigadzirwa. Iyi nhevedzano yezviridzwa ine chimiro chekambani, chimiro chakanaka, chimiro chakagadzikana, uye chine basa rekurasa mhirizhonga kunhuhwirira uye kutonhora. Iyo Yepamberi MCU (Multi-Point micro-control unit) yekudzora system inogona ongororo uye kudzora tembiricha uye otomatiki kuverenga, uye chengetedza mapoka gumi ezve test data. Nhoroondo dzezviridzwa zvine mhando dzemhando dzakasiyana siyana kusarudza kubva ku: otomatiki uchishandisa LCD screen Chinese (Chirungu) zvinyorwa kuratidza, otomatiki kuyerwa; Microcontrol inogona kubatana nekombuta, printer, inodzorwa nekombuta, test software windows (neyechirungu) yekufungidzira, yekuchengetedza nguva, yekuchengetedza data, kudhonzwa, kudhinda uye mamwe mabasa.

     

    Kusangana neyakajairwa

    Iso75, iso306, GB / T633, GB / T644, GB / T8802, ASTM D1525, ASTM D648

     

  • Yy-jb50 vacuum inosimudzira defoaming muchina (5L)

    Yy-jb50 vacuum inosimudzira defoaming muchina (5L)

    1. Kushanda Nheyo:

    Vacuum vanomhanya vachimhanya vanoshandiswa zvakanyanya mune vakawanda vagadziri vemabhuku, masayera ekutsvaga zvesayenzi, anogona kusanganisa zvinhu zvisina mbichana uye zvinogona kubvisa micron micrors mune izvo zvinyorwa. Parizvino, zvakawanda zvezvigadzirwa zviri pamusika zvinoshandisa nheyo yeplanetary, uye maererano nezvinodiwa nezvenzvimbo dzekuedza uye hunhu hwezvinhu, necuum kana isiri yemamiriro ezvinhu.

    2.WHat ndeyekushambadzira kwemuchina wokutsamwa kwePlanetary?

    Sezvo zita rinoratidza, muchina weplanetary wekushambadzira ndewekumusoro uye defoam zvinyorwa nekutenderera uchitenderera nepakati nepakati, uye mukana wakakura ndewekuti hazvidi kuonana nezvinyorwa.

    .

    .

    . Gadzira matatu-madimental kuyerera, kuwedzera kusimbisa kusanganisa uye kutsamwisa mhedzisiro yezvinyorwa.

     Yy-jb50 (5l) vacuum inosimudzira muchina wekudzvinyirira

  • YYP-300DT PC Kudzora HDT Vicat Tester

    YYP-300DT PC Kudzora HDT Vicat Tester

    1. Zvimiro uye zvinoshandiswa:

    Iyo PC Control HDT Vicat Tester inokodzera kuyedza Vicat Softening Tembiricha uye yekudziya gadziriso yePolymer zvinhu senge indekisi yekudzora maitiro ezvivakwa marudzi matsva. Iyo deformation inoyerwa neyakanyanya-chaiyo yekudzikisira sensor, uye huwandu hwekudziya hunoiswa otomatiki ne software. Mahwindo 7 ekushanda system uye software yemifananidzo yakazvitsaurira kune iyo yekushomeka kweiyo tembiricha yekudziya uye tembiricha yeanonyorova yekuita kuti kushanda kuchinjika uye kuyerwa kwakanyanya. Mirairo yemuenzaniso inomutswa otomatiki uye inodzikiswa, uye matatu samples inogona kuedzwa panguva. Novel dhizaini, kutaridzika kwakanaka, kuvimbika kwakanyanya. Iyo yekuyedza michina inokomberedza GB / T 1633 "Software point yeTremoplastics (Vica) nzira yekuyera", GB / T 1634 "