Kev Taw Qhia
Kev xaiv tus neeg muab khoom siv yeeb nkab tooj liab rau ib qho project kev lag luam cuam tshuam ntau dua li tus nqi ib chav. Qhov zoo ntawm tus neeg muab khoom cuam tshuam rau kev nyab xeeb ntawm lub kaw lus, kev teeb tsa raug, lub sijhawm ua haujlwm, kev ua raws li txoj cai, thiab kev pheej hmoo kev saib xyuas mus sij hawm ntev thoob plaws cov plumbing, HVAC, thiab cov tub yees. Phau ntawv qhia no piav qhia txog yuav ua li cas los ntsuam xyuas cov chaw tsim khoom thiab cov neeg koom tes ua lag luam siv cov txheej txheem ua tau zoo xws li qib khoom siv, qhov sib xws ntawm qhov loj me, daim ntawv pov thawj, kev taug qab, peev xwm tsim khoom, thiab kev ntseeg siab ntawm kev xa khoom. Nws kuj tseem qhia txog cov cim ceeb toom uas feem ntau ua rau muaj kev xau, rov ua haujlwm, qeeb, lossis lub sijhawm tsis ua haujlwm kim, yog li koj tuaj yeem piv cov neeg muab khoom nrog cov txheej txheem kev siv tshuab thiab kev yuav khoom kom meej dua ua ntej tso qhov kev txiav txim.
Vim Li Cas Tus Neeg Muab Khoom Siv Rau Cov Yeeb Nkab Tooj Liab Zoo Thiaj Tseem Ceeb
Cov kav dej lag luam xav tau qhov tseeb, thiab kev ua tiav ntawm cov tes hauj lwm no nyob ntawm qhov zoo ntawm lawv cov khoom. Xaiv ib qhocov khoom siv yeeb nkab tooj liabyog qhov kev txiav txim siab tseem ceeb ntawm kev yuav khoom uas cuam tshuam ncaj qha rau kev nyab xeeb, kev ua haujlwm zoo, thiab lub neej ntev ntawm cov kav dej lag luam, HVAC, thiab cov tshuab tub yees.
Thaum ua haujlwm ntawm cov nplai lag luam, txoj kev npaj yuav khoom yuav tsum hloov ntawm kev yuav khoom yooj yim mus rau kev nrhiav khoom zoo. Tus khub tsim khoom zoo ua kom ntseeg tau tias cov teeb meem kev ua haujlwm raug txo qis thiab kev ua tsis tiav ntawm lub kaw lus raug tiv thaiv ua ntej lawv tshwm sim.
Dab tsi txhais tau tias tus neeg muag khoom txhim khu kev qha
Ib tus neeg muag khoom uas ntseeg tau muaj tus cwj pwm los ntawm kev ua haujlwm sib xws, kev taug qab cov khoom siv tau zoo, thiab muaj peev xwm tsim khoom ntau ntxiv. Cov chaw tsim khoom siab ua raws li qhov ntev ntawm kev ua haujlwm, feem ntau tswj hwm qhov sib txawv kom nruj li ± 0.05 hli kom ntseeg tau tias cov hlab ntsha ua haujlwm zoo meej thaum lub sijhawm brazing lossis soldering.
Ntxiv mus, kev ntseeg siab txuas ntxiv mus rau cov khoom siv raw siv. Cov neeg muag khoom saum toj kawg nkaus tau txais cov tooj liab C12200 (DHP) qib siab, uas muab cov phosphorus deoxidation zoo tshaj plaws los tiv thaiv hydrogen embrittlement thaum lub sijhawm teeb tsa kub siab. Tus khub txhim khu kev qha yuav sau cov ntaub ntawv no kom meej, muab kev taug qab tag nrho los ntawm cov tooj liab nyoos mus rau qhov sib dhos tiav.
Cov kev pheej hmoo twg los ntawm kev xaiv cov neeg muag khoom tsis zoo
Kev xaiv cov neeg muag khoom tsis zoo ua rau muaj qhov tsis zoo ntawm lub cev uas tuaj yeem ua rau kev ua haujlwm tsis zoo. Cov khoom siv tsis zoo feem ntau raug kev txom nyem los ntawm cov phab ntsa tuab tsis sib npaug, cov kab nrib pleb me me, lossis kev ua kom sov tsis raug, ua rau lawv lub peev xwm tuav tau siab poob qis.
Cov kev pheej hmoo nyiaj txiag muaj ntau heev. Ib qho khoom siv tawg hauv lub tshuab cua txias siab (high pressure HVAC) uas ua lag luam tuaj yeem ua rau muaj kev puas tsuaj rau dej lossis cov khoom siv txias sai sai txog li $15,000, tsis suav nrog cov nqi sib xyaw uas cuam tshuam nrog lub sijhawm ua haujlwm tsis tau npaj tseg thiab kev ua haujlwm thaum muaj xwm txheej ceev. Tsis tas li ntawd, cov neeg muag khoom uas tsis muaj kev tswj xyuas zoo yuav hloov cov tooj liab tshiab nrog cov khoom seem uas tsis huv, ua rau kev xeb sab hauv sai dua thiab txo qhov kev cia siab 50 xyoo ntawm lub tshuab raj tooj liab kom tsawg dua kaum xyoo.
Cov Qauv Ntsuas Kev Txawj Ntse thiab Kev Zoo
Kev ntsuam xyuas txog kev siv tshuab kom zoo yog lub hauv paus ntawm txoj kev npaj yuav khoom zoo. Cov neeg yuav khoom yuav tsum saib dhau qhov kev lag luam saum npoo av kom txheeb xyuas cov ntaub ntawv pov thawj uas tswj hwm lub peev xwm tsim khoom ntawm tus neeg muag khoom.
Cov lus qhia tshwj xeeb thiab cov ntsuas siab twg tseem ceeb
Cov ntawv thov kev lag luam yuav tsum tau ua raws li cov qauv kev tsim kho thoob ntiaj teb. Hauv North America, ASME B16.22 hais txog cov lus qhia rau cov khoom siv tooj liab thiab tooj liab sib txuas ua ke, thaum cov haujlwm European feem ntau yuav tsum ua raws li EN 1254-1. Kev xyuas kom tus neeg muag khoom ua raws li cov qauv no lav qhov sib xws ntawm qhov ntev nrog cov kav dej tooj liab txheem.
Cov kev ntsuas siab kuj tseem ceeb ib yam nkaus, tshwj xeeb tshaj yog nyob rau hauv cov ntawv thov tshwj xeeb xws li kev lag luam tub yees. Piv txwv li, cov khoom siv siv hauv cov tshuab tub yees CO2 (R744) transcritical yuav tsum tau tiv taus kev ua haujlwm siab tshaj 700 PSI (kwv yees li 48 bar) thiab qee zaum txog li 1,800 PSI (124 bar) nyob ntawm theem tsim ntawm lub kaw lus. Cov neeg yuav khoom yuav tsum xyuas kom meej tias cov khoom ntawm tus neeg muag khoom tau ntsuas thiab sim rau cov xwm txheej hnyav no.
| Tus Qauv / Cov Lus Qhia Tshwj Xeeb | Cheeb Tsam Tseem Ceeb | Qhov Tseem Ceeb ntawm Daim Ntawv Thov | Kev Ntsuas Siab Feem Ntau |
|---|---|---|---|
| ASME B16.22 | Tebchaws Asmeskas Qaum Teb | HVAC, Plumbing, Kev Lag Luam Dav Dav | Cov kev kub siab ua haujlwm txheem (txawv ntawm qhov loj me / kub) |
| EN 1254-1 | Tebchaws Europe | Capillary brazing/soldering | Kev hloov pauv ntawm thermal thiab pressure siab |
| AS 3688 | Australia/NZ | Kev muab dej thiab roj | Cov kev txwv tsis pub siv cov hlau hnyav |
| UL 207 | Thoob Ntiaj Teb | Kev tswj cov tub yees | Txog li 700+ PSI rau cov tshuaj refrigerants tshwj xeeb |
Yuav ua li cas los ntsuam xyuas kev tsim khoom thiab kev tswj xyuas zoo
Cov kev tswj xyuas zoo (QC) ntawm tus neeg muag khoom qhia txog qhov sib xws ntawm lawv cov khoom tsim tawm. Cov neeg yuav khoom lag luam yuav tsum xav tau cov ntsiab lus ntxaws ntxaws ntawm cov txheej txheem sim siv ntawm theem Hoobkas. Cov kev ntsuam xyuas tseem ceeb suav nrog kev sim tam sim no eddy rau cov qhov tsis zoo metallurgical zais, kev sim hydrostatic burst, thiab kev sim pneumatic leak hauv qab dej.
Cov chaw tsim khoom siv tooj liab thoob ntiaj teb tswj hwm qhov tsis zoo hauv qab 500 Qhov Ib Lab (PPM). Cov neeg yuav khoom yuav tsum nug txog qhov zaus ntawm kev ntsuas rau cov khoom siv kuaj thiab seb lub chaw puas siv cov txheej txheem tshuaj xyuas qhov muag tsis siv neeg (AOI) los xyuas seb puas muaj qhov tsis raug ntawm qhov ntev ua ntej ntim khoom.
Yuav ua li cas piv cov neeg muag khoom nrog daim ntawv qhia qhab nia
Yuav kom ntsuam xyuas ntau tus neeg muag khoom kom raug, cov pab pawg yuav khoom yuav tsum siv daim ntawv qhia qhab nia ntawm cov neeg muag khoom. Cov cuab yeej tshuaj xyuas no tshem tawm kev ntxub ntxaug ntawm tus kheej los ntawm kev muab cov nqi lej rau cov cim qhia kev ua tau zoo tseem ceeb.
Ib daim ntawv qhia qhab nia kev lag luam tus qauv yuav muab 40% ntawm tag nrho cov qhab nia rau cov ntsuas zoo (cov nqi tsis zoo,cov ntawv pov thawj), 30% rau cov nqe lus lag luam (tus nqi ib chav, cov nqi cuab yeej), 20% rau kev xa khoom (lub sijhawm ua khoom, peev xwm), thiab 10% rau kev txhawb nqa kev siv tshuab thiab kev sib txuas lus. Cov neeg muab khoom uas tsis ua tiav qhov tsawg kawg nkaus - xws li 85 ntawm 100 cov qhab nia tag nrho - yuav tsum raug tshem tawm tam sim ntawd ntawm cov txheej txheem twv.
Kev Ua Raws Cai, Kev Muab Khoom, thiab Kev Tshuaj Xyuas Kev Lag Luam
Tsis tas li ntawm qhov zoo ntawm cov khoom, tus neeg muag khoom yuav tsum ua pov thawj tias ua raws li txoj cai, muaj peev xwm xa khoom, thiab muaj peev xwm nyiaj txiag tau zoo. Lub sijhawm no ntawm kev tshuaj xyuas no tiv thaiv tus neeg yuav khoom ntawm kev lav phib xaub raws li txoj cai thiab kev cuam tshuam ntawm cov khoom xa tuaj.
Cov ntawv pov thawj thiab cov ntaub ntawv twg yuav tsum tau txheeb xyuas
Cov ntaub ntawv pov thawj uas txheeb xyuas tau tsis tuaj yeem sib tham tau hauv kev yuav khoom lag luam. Cov kev cai tseem ceeb suav nrog daim ntawv pov thawj ISO 9001: 2015, uas ua pov thawj tias lub chaw tsim khoomcov txheej txheem tswj xyuas zooRau cov haujlwm uas muaj dej haus, cov khoom siv yuav tsum muaj daim ntawv pov thawj NSF/ANSI 61 thiab NSF/ANSI 372 kom lav tau tias ua raws li cov lus txib uas muaj cov khoom siv tsawg thiab tsis muaj tshuaj lom.
Tsis tas li ntawd xwb, cov neeg yuav khoom yuav tsum thov cov Ntawv Qhia Txog Kev Ntsuas Zeb (MTRs) nrog txhua qhov kev xa khoom. MTR muab cov tshuaj lom neeg tseeb ntawm cov tooj liab, lees paub tias cov khoom siv ua tau raws li qhov yuav tsum tau ua kom huv si tsawg kawg nkaus 99.9% (Tooj + Nyiaj) rau cov qib kev lag luam txheem. Qhov tsis muaj lossis ua cuav ntawm MTRs yog qhov ua txhaum loj heev ntawm cov txheej txheem yuav khoom.
Yuav ua li cas los soj ntsuam lub sijhawm ua khoom thiab kev ntseeg siab ntawm kev xa khoom
Kev ua haujlwm ntawm cov khoom xa tuaj yog qhov tseem ceeb rau kev ntsuam xyuas cov neeg muab khoom. Lub sijhawm ua cov khoom siv tooj liab feem ntau yog li ntawm 30 txog 45 hnub, tsis suav nrog lub sijhawm thauj mus los hauv dej hiav txwv. Txawm li cas los xij, cov neeg yuav khoom yuav tsum ntsuam xyuas seb cov neeg muab khoom ua li cas rau lub caij nyoog siab tshaj plaws thiab cov khoom siv tsis txaus.
Ib tus neeg muag khoom uas ntseeg tau yuav tsum tswj hwm tus nqi xa khoom raws sijhawm (OTD) tsis tu ncua tshaj 95%. Cov neeg yuav khoom kuj yuav tsum tshawb xyuas cov cai ntawm tus neeg muag khoom. Cov neeg muag khoom uas tswj hwm 10% txog 15% kev nyab xeeb ntawm cov SKUs uas txav mus los sai qhia txog txoj hauv kev ua ntej los txo qhov kev thov ntawm cov neeg siv khoom lossis kev ncua sijhawm xa khoom tsis tau xav txog.
Yuav tsum tshuaj xyuas dab tsi hauv cov lus hais, MOQs, thiab cov nqe lus them nqi
Kev sib tham txog kev lag luam yuav tsum nkag siab meej txog kev cia siab nyiaj txiag ntawm tus neeg muag khoom. Qhov tsawg kawg nkaus ntawm kev txiav txim (MOQs) sib txawv ntau nyob ntawm qhov ntsuas kev tsim khoom. Cov chaw tsim khoom ncaj qha los ntawm txawv teb chaws feem ntau yuam kom muaj MOQs txij li 1,000 txog 5,000 daim rau ib qho SKU tshwj xeeb, thaum cov neeg faib khoom hauv tsev tshwj xeeb yuav muab MOQs qis li 100 daim ntawm tus nqi siab.
Cov nqe lus them nqi kuj qhia txog kev ruaj khov nyiaj txiag thiab kev ntseeg siab ntawm tus neeg muag khoom. Tus qauv them nqi thoob ntiaj teb yog 30% ua ntej los ntawm Telegraphic Transfer (T/T), nrog rau 70% seem them tawm tsam daim ntawv theej ntawm Bill of Lading (B/L). Cov neeg yuav khoom uas cog lus rau cov ntawv cog lus txhua xyoo tshaj $ 100,000 yuav tsum sib tham txog cov nqe lus qiv nyiaj ntev, xws li Net 30 lossis Net 60, los txhim kho cov nyiaj ntsuab ntawm cov tuam txhab.
Cov Txheej Txheem Xaiv Cov Neeg Muab Khoom Siv
Kev ua tiav cov txheej txheem xaiv tsa uas muaj cov qauv hloov pauv kev ntsuam xyuas theoretical mus rau kev lees paub qhov tseeb. Qhov no suav nrog kev hloov pauv ntawm kev sib cuag thawj zaug mus rau kev sim ua tiag tiag ntawm lub ntiaj teb tiag tiag ntawm cov peev xwm ntawm tus neeg muag khoom.
Yuav ua li cas khiav RFQs, kev kuaj xyuas, thiab kev tshuaj xyuas Hoobkas
Daim Ntawv Thov Kev Hais Nqe (RFQ) yuav tsum muaj tag nrho, suav nrog 2D/3D CAD cov duab kos, cov khoom siv uas yuav tsum tau ua, thiab kev kwv yees txhua xyoo. Thaum cov lus hais raug sib phim, cov neeg yuav khoom yuav tsum tau yuav 50 txog 100 daim qauv ntawm cov SKU tseem ceeb. Cov qauv no yuav tsum tau kuaj xyuas los ntawm cov neeg sab nraud kom paub tseeb tias qhov loj me yog dab tsi, cov khoom siv huv, thiab cov kev txwv ntawm qhov siab.
Tom qab ua tiav qhov kev kuaj xyuas cov qauv, kev tshuaj xyuas lub Hoobkas hauv chaw yog qhov tseem ceeb rau cov ntawv cog lus loj. Yog tias kev mus ntsib tus kheej tsis ua tau, kev ntiav lub tuam txhab tshuaj xyuas sab nraud xws li SGS lossis TÜV Rheinland yog qhov pom zoo heev. Cov neeg tshuaj xyuas yuav tsum tshuaj xyuas lub hnub nyoog thiab cov xwm txheej ntawm cov khoom siv tsim khoom; piv txwv li, CNC machining centers thiab extrusion presses uas laus dua 10 txog 15 xyoo yuav nyuaj rau tswj hwm qhov kev kam rau siab uas xav tau rau cov ntawv thov kev lag luam niaj hnub.
Thaum twg yuav tsum xaiv lub chaw tsim khoom, tus faib khoom, lossis tus khub OEM
Cov pab pawg yuav khoom yuav tsum sib phim lawv hom neeg muab khoom nrog lawv cov kev xav tau ua haujlwm tshwj xeeb. Qhov kev xaiv ntawm ib qhochaw tsim khoom ncaj qha, tus neeg faib khoom tshwj xeeb, lossis tus khub tsim khoom qub (OEM) nyob ntawm qhov ntim, kev hloov kho kom haum, thiab cov kev xav tau ntawm kev xa khoom.
| Hom Neeg Muab Khoom | Qhov Ntim Zoo / MOQ | Kev Muaj Peev Xwm Kho Kom Haum | Qhov Zoo Tshaj Plaws |
|---|---|---|---|
| Chaw Tsim Khoom Ncaj Qha | Siab (> 10,000 daim) | Siab heev (Cov cuab yeej siv tau raws li qhov xav tau) | Tus nqi qis tshaj plaws rau ib chav tsev, kev tswj xyuas zoo ncaj qha |
| Tus Muag Khoom Lag Luam Wholesale | Qis mus rau Nruab Nrab (<5,000 daim) | Qis (Tus qauv tawm ntawm lub txee xwb) | Kev xa khoom sai, kev sib xyaw ua ke ntawm SKU |
| OEM / Tus Khub Cog Lus | Nruab Nrab Mus Rau Siab | Siab (Cov qauv tsim tshwj xeeb) | Kev txhawb nqa engineering, kev sib dhos ua ke |
Cov chaw tsim khoom ncaj qha yog qhov kev xaiv zoo tshaj plaws rau cov xaj ntau thiab rov ua dua qhov twg kev tsav kom tus nqi ib chav yog qhov tseem ceeb. Ntawm qhov tod tes, cov neeg faib khoom zoo dua thaum ib qhov project xav tau kev nkag mus rau ntau pua tus qauv SKUs sib txawv hauv cov khoom me me, hla lub sijhawm ua khoom 45 hnub uas ib txwm muaj ntawm cov xaj ncaj qha los ntawm lub Hoobkas.
Kev Txiav Txim Zaum Kawg
Qhov kawg ntawm cov txheej txheem kev tshuaj xyuas yog qhov kev xaiv zaum kawg. Qhov no yuav tsum tau muab cov ntaub ntawv sau los ua ke, lees paub cov cim ceeb toom, thiab muab qhov tseem ceeb rau lub sijhawm ntev dua li kev txuag nyiaj luv luv.
Cov cim liab twg yuav tsum tau saib xyuas
Thaum lub sijhawm tshuaj xyuas zaum kawg, qee cov cim liab yuav tsum nres kev sib tham tam sim ntawd. Ib qho cim ceeb toom tseem ceeb yog tus nqi uas poob qis dua 15% txog 20% qis dua qhov nruab nrab ntawm kev ua lag luam rau tooj liab nyoos. Vim tias tooj liab yog cov khoom lag luam thoob ntiaj teb nrog tus nqi pom tseeb, cov nqi qis dua feem ntau qhia txog qhov tuab ntawm phab ntsa puas tsuaj, kev siv cov khoom siv rov ua dua tshiab uas muaj cov khoom tsis huv ntau, lossis kev ua haujlwm tsis zoo.
Lwm yam teeb meem tseem ceeb uas yuav tsum tau ceev faj yog kev sib txuas lus tsis zoo txog cov khoom xa tuaj. Yog tias tus neeg muag khoom tsis tuaj yeem tsim cov ntawv qhia txog kev tshuaj xyuas ISO tshiab, tsis kam lees cov neeg sab nraud los tshuaj xyuas cov khoom lag luam, lossis hloov pauv lawv cov ntaub ntawv hais txog kev lag luam hauv tuam txhab, qhov kev pheej hmoo ntawm kev dag ntxias lossis kev ua tsis zoo ntawm cov khoom yog siab heev.
Yuav ua li cas thiaj li sib npaug tus nqi, qhov zoo, thiab kev txhawb nqa
Thaum kawg, kev xaiv tus neeg muab khoom siv yeeb nkab tooj liab yog ib qho kev tawm dag zog hauv kev xam tus nqi tag nrho ntawm kev muaj (TCO). Kev tsom mus rau tus nqi qis tshaj plaws yog ib qho tswv yim tsis zoo. Piv txwv li, ib qho khoom siv uas raug nqi $ 0.05 tsawg dua tab sis raug kev txom nyem los ntawm kev tsis zoo ntawm qhov ntev tuaj yeem ua rau tus kws kho yeeb nkab teeb tsa thiab lub sijhawm brazing nce 10%. Ntawm ntau txhiab qhov sib koom ua ke, qhov kev ua haujlwm tsis zoo no ntau dua li cov khoom siv txuag tau thaum pib.
Qhov kev txiav txim siab zaum kawg yuav tsum sib npaug tus nqi sib tw nrog cov ntsuas zoo uas tau ua pov thawj thiab kev txhawb nqa tom qab muag zoo. Tus neeg muag khoom uas muab kev pab txhawb nqa kev tsim kho, ua raws li cov lus thov lav tsis muaj kev sib txhuam, thiab tswj hwm 99.9% cov khoom siv huv si yuav ua rau muaj kev ua tau zoo, ua kom ntseeg tau tias lub network kav dej kev lag luam muaj kev ncaj ncees rau ntau xyoo tom ntej.
Cov Ntsiab Lus Tseem Ceeb
- Cov lus xaus tseem ceeb tshaj plaws thiab cov laj thawj rau cov khoom siv yeeb nkab tooj liab
- Cov lus qhia tshwj xeeb, kev ua raws li txoj cai, thiab kev kuaj xyuas kev pheej hmoo uas tsim nyog lees paub ua ntej koj cog lus
- Cov kauj ruam tom ntej thiab cov lus ceeb toom uas cov nyeem ntawv tuaj yeem siv tau tam sim ntawd
Cov Lus Nug Feem Ntau
Tus neeg muab khoom siv yeeb nkab tooj liab yuav tsum ua raws li cov qauv twg?
Rau cov haujlwm lag luam, xyuas kom meej tias ua raws li ASME B16.22, EN 1254-1, lossis cov qauv tshwj xeeb rau cov haujlwm. Nug cov ntawv qhia kev xeem tsis ntev los no thiab cov ntaub ntawv qhov ntev, tsis yog tsuas yog daim ntawv teev npe xwb.
Kuv yuav ua li cas thiaj paub tseeb tias cov khoom siv tooj liab zoo ua ntej yuav khoom?
Thov daim ntawv pov thawj khoom siv uas qhia txog C12200 (DHP) tooj liab, kev taug qab ntau ntau, thiab cov ntaub ntawv qhov chaw. Tus neeg muag khoom txhim khu kev qha yuav tsum txuas txhua qhov khoom sib txuas rov qab rau cov khoom siv raw.
Cov kev ntsuam xyuas hauv Hoobkas twg tseem ceeb tshaj plaws rau cov khoom siv tooj liab hauv kev lag luam?
Muab qhov tseem ceeb rau kev sim hydrostatic burst, kev sim pneumatic leak, kev tshuaj xyuas eddy current, thiab kev kuaj qhov ntev. Nug seb cov khoom siv sim raug calibrated ntau npaum li cas thiab seb cov txiaj ntsig puas raug kaw los ntawm ntau pawg.
Puas yog nbfh-metal.com txhawb nqa kev txiav txim siab ntau ntawm cov tooj liab rau kev lag luam?
Tshawb xyuas seb puas muaj peev xwm tsim khoom tau, lub sijhawm ua khoom tiav, thiab seb tus neeg muag khoom puas tuaj yeem ua kom qhov kev kam rau siab sib xws thoob plaws cov khoom loj. Xyuas kom meej tias cov khoom ntim khoom, kev xa tawm mus rau txawv teb chaws, thiab kev ruaj khov ntawm kev xaj khoom rov ua dua ua ntej pom zoo rau kev yuav khoom ntau.
Cov cim ceeb toom twg qhia tias tus neeg muab khoom siv yeeb nkab tooj liab tsis ntseeg tau?
Yuav tsum ceev faj yog tias lawv tsis muab tau daim ntawv pov thawj, qib siab, kev taug qab, lossis cov ntaub ntawv QC. Cov phab ntsa tuab tsis sib xws, cov ntaub ntawv tsis meej, thiab lub sijhawm ua khoom tsis meej yog cov cim qhia tias yuav muaj teeb meem.
Lub sijhawm tshaj tawm: Plaub Hlis-30-2026