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Cov khoom

  • magnetic nqus tsev vacuum, hlau particle muaj kuab paug, sib nqus lim, siab-zog mus tas li hlau nplaum, pipeline blockage

    magnetic nqus tsev vacuum, hlau particle muaj kuab paug, sib nqus lim, siab-zog mus tas li hlau nplaum, pipeline blockage

    Sib nqus plua plav tshem tawm yog ib qho cuab yeej uas tuaj yeem tshem tawm cov pa phem hlau hauv cov kav dej.Nws siv lub zog sib nqus ntawm cov hlau nplaum uas muaj zog ruaj khov rau adsorb hlau hais nyob rau hauv cov raj xa mus rau cov ntxaij lim dej sib nqus, yog li ua tiav lub hom phiaj ntawm kev ntxuav.Cov khoom siv hlau nplaum tau siv dav hauv kev lag luam, suav nrog kev kho dej, petrochemicals, metallurgy, chiv, lub teeb kev lag luam, hluav taws xob, khoom siv hauv tsev, thiab lwm yam lag luam.Cov kev thov tshwj xeeb muaj xws li: 1. Boiler system: Magnetic av tshem tawm tuaj yeem tshem tawm cov khoom hlau hauv lub boiler system, tiv thaiv cov kav dej thiab cov khoom puas tsuaj, thiab txhim kho kev ua haujlwm thiab kev ua neej nyob ntawm lub cev.2. Cov cua txias: Cov khoom siv hlau nplaum tshem tawm tuaj yeem tshem tawm cov khoom hlau hauv qhov cua txias, tiv thaiv cov khoom cua txias, thiab txo cov nqi tu.3. Oilfield exploitation: Sib nqus plua plav tshem tawm tuaj yeem tshem tawm cov khoom hlau hauv oilfield exploitation, tiv thaiv oilfield khoom, thiab txhim kho oilfield exploitation efficiency.4. Kev tsim tshuaj lom neeg: Sib nqus cov av tshem tawm tuaj yeem tiv thaiv cov pa phem los ntawm kev nkag mus rau hauv cov txheej txheem tsim tshuaj, ua kom cov khoom zoo thiab kev nyab xeeb ntawm kev tsim khoom.Nyob rau hauv luv luv, magnetic av removers yog ib tug npaum thiab txhim khu kev qha av tshem tawm cov cuab yeej siv dav siv rau kev tu thiab tiv thaiv cov kav dej thiab cov khoom siv.Cov khoom no muaj daim ntawv pov thawj CE.

  • F * M threaded kev nyab xeeb valve, siab kev nyab xeeb valve, tiv thaiv overload, pipeline valve

    F * M threaded kev nyab xeeb valve, siab kev nyab xeeb valve, tiv thaiv overload, pipeline valve

    F * M threaded kev nyab xeeb valve yog lub siab tiv thaiv kev ruaj ntseg ntaus ntawv tshwj xeeb siv hauv cov kav dej.Nws cov yam ntxwv yog yooj yim siv, qauv yooj yim, txhim khu kev qha kev ua haujlwm, thiab kev ua haujlwm ruaj khov.Qhov kev nyab xeeb valve no muaj qhov zoo ntawm qhov tsis tshua muaj siab qhib siab, ruaj khov ntws ntws, thiab kev hloov kho kom raug, uas tuaj yeem ua kom tsis txhob muaj kev sib tsoo ntawm cov kav dej los ntawm kev kub siab, yog li zam qhov tshwm sim ntawm kev nyab xeeb xwm txheej.Tsis tas li ntawd, F * M threaded kev ruaj ntseg valve kuj muaj cov khoom siv hloov tau, ua kom nws ruaj khov thiab txhim khu kev qha, nrog lub neej ua haujlwm ntev.F * M threaded kev ruaj ntseg li qub yog siv dav hauv cov kav dej hauv kev lag luam xws li petrochemical, nuclear fais fab nroj tsuag, tshuaj tshuaj, metallurgy, thiab lub zog, los tiv thaiv kev nyab xeeb ntawm cov kav dej thiab khoom siv.Nws yog qhov tsim nyog rau cov kav dej nrog lub cheeb ntawm DN15-50mm, nrog kev ntsuas siab ntawm PN10-64 thiab qhov kub ntawm -196 ℃ txog 650 ℃.Hauv kev lag luam ntawm cov khoom siv tswj tsis siv neeg thiab cov cuab yeej muaj kev nyab xeeb, F * M threaded kev nyab xeeb li qub kuj ua lub luag haujlwm tseem ceeb.Cov khoom no muaj daim ntawv pov thawj CE.

  • F * F threaded kev nyab xeeb valve, siab kev nyab xeeb valve, kev tiv thaiv overload, pipeline valve, petrochemical kev lag luam

    F * F threaded kev nyab xeeb valve, siab kev nyab xeeb valve, kev tiv thaiv overload, pipeline valve, petrochemical kev lag luam

    F * F threaded kev ruaj ntseg valve yog lub valve siv los tso siab ntau dhau hauv cov kav dej, tseem hu ua lub siab ruaj ntseg valve.Nws yog tsim los ntawm lub cev valve, kho lub caij nplooj ntoos hlav, piston, sealing nplhaib, valve npog, thiab lwm yam.Thaum lub siab nyob rau hauv lub raj xa dej ntau tshaj qhov teeb tsa, lub valve cia li qhib kom tso tawm qhov siab tshaj.Hom kev ruaj ntseg valve no tuaj yeem tiv thaiv cov kav dej thiab cov khoom siv los ntawm kev kub siab dhau los yog kev sib hloov ntawm lub siab.F * F threaded kev ruaj ntseg li qub feem ntau yog siv rau ntawm cov kab ntau lawm hauv kev lag luam xws li roj av, petrochemical, tshuaj, metallurgical, thiab fais fab, feem ntau yog siv rau kev tswj cov khoom siv thiab cov kav dej hauv qab cov cua kub siab.Cov khoom no muaj cov yam ntxwv ntawm kev txhim khu kev qha zoo, kev siv yooj yim, thiab kev ua haujlwm raug.Nws tuaj yeem hloov mus rau qhov sib txawv ntawm cov yeeb nkab diameters thiab qib siab, thiab tau siv dav hauv ntau lub sijhawm ua haujlwm, xws li cov chaw siv hluav taws xob, nuclear fais fab nroj tsuag, petrochemical thiab lwm yam lag luam.Daim ntawv thov ntawm kev nyab xeeb li qub yog qhov dav heev hauv kev lag luam xws li roj thiab roj.Nyob rau hauv cov txheej txheem cov cuab yeej ntawm kev lag luam xws li roj av, petrochemical, tshuaj lom neeg, metallurgy, thiab lub zog, qhov teeb meem ntawm kev xau feem ntau tshwm sim.Kev ua haujlwm ntawm kev nyab xeeb li qub yog ua kom tau txais kev tswj tsis siv neeg thiab ua kom muaj kev nyab xeeb ntawm cov khoom siv thiab cov neeg ua haujlwm.Ntawm qee cov hlab ntsha siab thiab cov reactors, kev nyab xeeb li qub kuj tseem yog cov khoom siv tswj tsis tau.Hauv cov ntsiab lus, F * F threaded kev nyab xeeb valve yog lub raj xa dej tseem ceeb feem ntau yog siv los tswj kev ua haujlwm ntawm cov khoom siv thiab cov kav dej nyob rau hauv cov xwm txheej siab, tiv thaiv cov kav dej thiab cov khoom siv los ntawm kev kub siab dhau, thiab yog ib qho tseem ceeb ntawm kev nyab xeeb ntawm kev lag luam niaj hnub no.Cov khoom no muaj daim ntawv pov thawj CE.

  • STA tsev neeg radiator, tooj dag tsis siv neeg lub kaum sab xis kub tswj valve rau radiator

    STA tsev neeg radiator, tooj dag tsis siv neeg lub kaum sab xis kub tswj valve rau radiator

    Lub kaum sab xis tsis siv neeg tswj qhov kub thiab txias yog lub valve uas sib koom ua ke ntau yam haujlwm xws li kev tswj qhov kub thiab txias, tswj kev khiav, thiab kev tiv thaiv rov qab.Nws tswj qhov ntsuas kub thiab tswj tau ntws los ntawm kev tswj tsis siv neeg.Nyob rau hauv tus txheej txheem ntawm kev tiv thaiv cov dej ntws rov qab, nws tseem tuaj yeem ua kom cov kev taw qhia kom raug ntawm cov dej ntws, yog li tsis txhob muaj kev pheej hmoo ntawm cov kav dej muaj kuab paug thiab cov kav dej tawg.Lub kaum sab xis tsis siv neeg tswj qhov kub thiab txias feem ntau muaj lub cev valve, valve disc, caij nplooj ntoos hlav thiab lwm yam khoom.Raws li cov xwm txheej siv sib txawv, cov qauv sib txawv xws li pob hom, hom clamp, thiab hom rooj vag tuaj yeem xaiv, nrog rau cov khoom sib txawv xws li tooj dag, stainless hlau, thiab cam khwb cia hlau.Tsis siv neeg lub kaum sab xis tswj qhov kub thiab txias yog feem ntau siv rau hauv thaj chaw xws li HVAC, dej xa dej, kev tso dej, kev tswj cov txheej txheem tshuaj, thiab lub tsev tiv thaiv hluav taws.Hauv HVAC cov tshuab, nws tuaj yeem ua lub luag haujlwm tseem ceeb rau kev tswj qhov kub thiab txias tsis tu ncua, tswj qhov kub thiab txias hauv tsev.Hauv kev tswj cov txheej txheem tshuaj, nws tuaj yeem kho tus nqi ntws thiab kub raws li cov txheej txheem tshuaj sib txawv.Hauv kev tiv thaiv hluav taws hauv tsev, lub kaum ntse ntse tswj qhov kub thiab txias, ua lub ntsiab kaw lub valve, tuaj yeem tswj tau lub valve hloov thiab dej ntws kom ntseeg tau tias kev ua haujlwm zoo ntawm kev tiv thaiv hluav taws.Tsis tas li ntawd, nws tseem tuaj yeem ua ke nrog cov kev tswj hwm ntse kom ua tiav cov chaw taws teeb tswj thiab cov ntaub ntawv sau cov haujlwm.Cov khoom no muaj daim ntawv pov thawj CE.

  • rotary ntxhua khaub ncaws faucet, tooj dag khoom, phau ntawv tswj, dej ntws, dej siab, ntws tswj

    rotary ntxhua khaub ncaws faucet, tooj dag khoom, phau ntawv tswj, dej ntws, dej siab, ntws tswj

    Lub tshuab ntxhua khaub ncaws teb faucet yog faucet tsim tshwj xeeb rau cov tshuab ntxhua khaub ncaws, ua los ntawm cov khoom siv tooj dag zoo, nrog rau kev ua haujlwm ntev thiab kev tiv thaiv corrosion.Lub faucet no tuaj yeem tswj cov dej ntws thiab qhov siab, thiab tau nruab nrog cov tswj dej ntws thiab dej ntws, tso cai rau cov neeg siv kom tswj tau cov dej ntws thiab siv dej kom raug, txuag dej zoo.Nws yog ib qho khoom noj khoom haus thiab kev lag luam.Ntxiv rau qhov tsim nyog rau cov tshuab ntxhua khaub ncaws hauv tsev, lub pob qhov rooj hom tshuab ntxhua khaub ncaws faucet kuj tuaj yeem siv dav hauv kev lag luam thiab kev lag luam, xws li tsev so, tsev so, tsev kho mob, khw ntxhua khaub ncaws, thiab lwm yam. ntawm ib puag ncig sib txawv thiab cov neeg siv.Tsis tas li ntawd, lub tshuab ntxhua khaub ncaws teb faucet tseem muaj lub luag haujlwm xauv, uas yooj yim rau cov neeg siv thiab ua haujlwm, thiab tuaj yeem ua tau raws li cov neeg siv khoom sib txawv.Hauv luv luv, lub tshuab ntxhua khaub ncaws faucet muaj qhov zoo ntawm kev siv dav, kev txuag dej, thiab kev ua haujlwm siab, ua rau nws yog cov khoom siv faucet.Cov khoom no muaj daim ntawv pov thawj CE.

  • phau ntawv thiab tsis siv neeg kub tswj valve, tsis siv neeg tswj valve, qhov kub thiab txias valve, tswj qhov kub thiab txias

    phau ntawv thiab tsis siv neeg kub tswj valve, tsis siv neeg tswj valve, qhov kub thiab txias valve, tswj qhov kub thiab txias

    Phau ntawv thiab tsis siv neeg lub kaum ntse ntse tswj qhov kub thiab txias valve yog lub valve uas sib koom ua ke ntawm phau ntawv thiab tsis siv neeg tswj kev ua haujlwm, uas tuaj yeem ua tiav qhov kev hloov pauv thiab tswj cov dej kub.Lub valve no feem ntau yog ua los ntawm cov khoom zoo xws li tooj dag lossis stainless hlau, thiab muaj kev tiv thaiv corrosion zoo heev, durability, thiab stability.Daim ntawv thov teb ntawm tes thiab tus kheej kev sib koom ua ke lub kaum ntse ntse ntsuas qhov ntsuas kub yog qhov dav heev, feem ntau suav nrog cov hauv qab no: 1 HVAC system: Phau ntawv thiab tsis siv neeg lub kaum ntse ntse ntsuas qhov ntsuas kub tuaj yeem siv los kho cov dej ntws kub hauv cov cua txias. , ua kom tau raws li qhov tsim nyog qhov kub thiab txias kev txuag hluav taws xob.2. Kev tswj cov kua dej muaj zog: Lub valve no tuaj yeem hloov kho cov kua dej kub thiab tsim nyog rau ntau lub sijhawm tswj kev lag luam, xws li tshuaj, tshuaj, zaub mov thiab lwm yam kev lag luam.3. Txias ntawm automotive thiab marine engines: Phau ntawv thiab tsis siv neeg lub kaum sab xis valve qhov kub thiab txias tswj valve yog tsim rau kev tswj cov dej ntws kub ntawm lub tsheb thiab marine cav, txhim kho kev ua hauj lwm efficiency thiab lifespan ntawm lub cav.4. Cov dej ntws tawm: Nws tuaj yeem siv rau ntau lub tshuab dej ntws, xws li cov pas dej da dej, thoob dej yug ntses, thiab lwm yam, kom tswj tau qhov dej ntws zoo.5. Lwm qhov chaw: Cov tes tsis siv neeg lub kaum ntse ntse tswj qhov kub thiab txias tuaj yeem siv rau hauv thaj chaw xws li cov kav dej, ib puag ncig engineering, cua sov tshuab, thiab lwm yam, kom ua tiav kev tswj xyuas cov dej kub.Cov khoom no muaj daim ntawv pov thawj CE.

  • STA tsev neeg cua sov dab dej, tooj dag phau ntawv ncaj qha kub tswj valve rau radiatorsinternally thiab tuaj yeem hloov kho qhov qhib ntawm lub valve raws li qhov ntsuas kub.

    STA tsev neeg cua sov dab dej, tooj dag phau ntawv ncaj qha kub tswj valve rau radiatorsinternally thiab tuaj yeem hloov kho qhov qhib ntawm lub valve raws li qhov ntsuas kub.

    Manual direct kub tswj valve yog ib tug ntaus ntawv raws li qhov kub thiab txias hloov valve, uas yuav manually tswj.Nws yog txawm peem rau nrog ib tug kub controller nyob rau hauv thiab tuaj yeem hloov kho qhov qhib ntawm lub valve raws li qhov kub thiab txias.Feem ntau siv hauv cov tshuab cua sov hauv tsev, dej txias, tshuab cua txias, thiab lwm yam. Cov lus tseem ceeb muaj xws li lub cev lub cev, lub valve core, valve qia, handwheel, kub tswj, tswj qhov kub thiab txias, kev ua haujlwm yooj yim, thiab kev hloov kho ntse.

  • phau ntawv lub kaum sab xis valve hom, tswj qhov kub thiab txias valve, tswj kev khiav dej num, kev tswj qhov kub thiab txias, cua sov kav

    phau ntawv lub kaum sab xis valve hom, tswj qhov kub thiab txias valve, tswj kev khiav dej num, kev tswj qhov kub thiab txias, cua sov kav

    Lub kaum sab xis ntawm qhov ntsuas kub tswj lub valve yog cov khoom siv dav dav, uas muaj lub cev lub cev thiab kev tswj xyuas phau ntawv, uas tuaj yeem hloov kho qhov ntws thiab qhov kub thiab txias.Nws yog tsim rau ntau yam HVAC systems thiab muaj cov yam ntxwv ntawm kev ua haujlwm yooj yim, kev teeb tsa yooj yim, kev tiv thaiv corrosion, thiab kev ua haujlwm ntev.Kev tuav lub kaum sab xis ntawm qhov ntsuas kub tswj li qub feem ntau siv hauv cov kav dej cua sov me me thiab HVAC cov tshuab, xws li kev tswj hwm qhov kub thiab txias hauv tsev, tiv thaiv lub caij ntuj no, thiab lwm yam kev siv.Nws cov yam ntxwv yooj yim thiab siv tau ua rau nws nquag siv hauv qhov chaw xws li tsev, chaw ua haujlwm, thiab cov chaw tsim khoom lag luam.Cov khoom no muaj daim ntawv pov thawj CE.

  • pob valve tooj dag diverter, dej system, dej faib, hluav taws xob tiv thaiv system, hluav taws kub hydrant

    pob valve tooj dag diverter, dej system, dej faib, hluav taws xob tiv thaiv system, hluav taws kub hydrant

    Pob valve brass diverter yog ib qho kev sib cais valve siv nyob rau hauv cov kav dej, ua los ntawm cov khoom siv tooj dag zoo nrog corrosion kuj, durability, stability, thiab kev nyab xeeb.Cov khoom no muaj qhov chaw nkag thiab qhov hluav taws xob, haum rau ntau lub sijhawm xws li kev faib dej.Pob valve tooj dag diverters tuaj yeem siv dav hauv ntau qhov chaw.Hauv kev tiv thaiv hluav taws, pob valve tooj dag diverters feem ntau yog siv los txuas hluav taws xob thiab cov khoom siv tua hluav taws, nrog rau kev sib txuas ntawm cov dej hose thiab tswj kev ntws.Hauv cov pas dej da dej thiab cov khoom siv dej nag, cov khoom no kuj tseem siv tau los hloov cov dej ntws, ua kom muaj kev ruaj ntseg thiab kev siv dej siab tshaj plaws.Pob valve tooj dag diverters tuaj yeem ua haujlwm hauv kev tswj cov khoom siv thiab cov dej ntws siab.Zuag qhia tag nrho, pob valve tooj dag diverters tuaj yeem suav tias yog lub hauv paus tseem ceeb ntawm cov tshuab dej, siv dav hauv ntau qhov chaw, ua kom muaj kev nyab xeeb, smoothness, thiab ruaj khov ntawm cov dej ntws, thiab ua lub luag haujlwm tseem ceeb heev.Cov khoom no muaj daim ntawv pov thawj CE.

  • tooj dag faucets, dej ntws tswj, rotating rods, li qub, ntws tswj, siab tswj, durability

    tooj dag faucets, dej ntws tswj, rotating rods, li qub, ntws tswj, siab tswj, durability

    Brass faucet yog cov dej ntws tswj cov cuab yeej siv dav hauv tsev thiab chaw ua haujlwm.Nws yog ua los ntawm cov khoom siv tooj dag nrog lub zog siab, corrosion kuj, thiab kav ntev.Cov khoom no siv cov thev naus laus zis tshiab hauv kev tsim sab hauv thiab cov qauv, uas tuaj yeem tswj cov dej ntws los ntawm cov pas nrig thiab cov li qub kom ua tiav cov dej ntws thiab kev tswj xyuas siab.Brass faucets tuaj yeem txuas nrog lwm cov kav dej lossis cov khoom siv raws li xav tau.Daim ntawv thov teb: tooj dag faucets tau dav siv hauv tsev, kev lag luam, thiab kev lag luam.Hauv tsev neeg, nws yog siv los ua lub taub hau da dej, khoom siv hauv chav dej, lub tshuab ntxhua khaub ncaws, chav ua noj faucet, thiab lwm yam. Hauv kev lag luam, cov faucet tooj dag feem ntau pom nyob rau hauv tsev so, tsev noj mov, chav dej pej xeem, thiab lwm qhov chaw.Hauv kev lag luam teb, tooj dag dej nozzles yog siv rau hauv cov txheej txheem tswj, automation tswj, thiab lwm yam.Vim nws qhov yooj yim ntawm kev teeb tsa thiab siv, nrog rau nws qhov ruaj khov thiab ruaj khov, tooj dag faucets tau dhau los ua cov khoom siv dav siv thiab nrov dej ntws tswj.Cov khoom no muaj daim ntawv pov thawj CE.

  • Cov khoom siv tooj dag, phau ntawv tswj, tswj dej ntws, dej ntws tswj, txuag dej thiab txuag hluav taws xob, kev lag luam daim ntawv thov

    Cov khoom siv tooj dag, phau ntawv tswj, tswj dej ntws, dej ntws tswj, txuag dej thiab txuag hluav taws xob, kev lag luam daim ntawv thov

    Brass lub kaum sab xis valve yog cov khoom siv ntawm cov kav dej tswj tau siv, feem ntau yog ua los ntawm cov khoom siv tooj dag, nrog kev ua haujlwm zoo thiab kev ua haujlwm zoo, uas tuaj yeem tswj cov dej ntws thiab siab.Lub luag haujlwm tseem ceeb ntawm cov khoom no yog los ua tus tswj dej ntws thiab dej ntws tswj, txhawm rau txuag dej thiab tiv thaiv ib puag ncig.Lub kaum sab xis tooj dag muaj ntau yam kev siv thiab tuaj yeem siv rau hauv kev lag luam, kev lag luam, tsev so, tsev so, tsev kho mob, ntxhua khaub ncaws thiab lwm yam.Hauv kev lag luam thiab kev lag luam, tooj dag lub kaum ntse ntse yog siv los tswj cov kav dej hauv cov tshuab, cov kab ntau lawm, thiab cov chaw tsim khoom.Nyob rau hauv cov chaw pej xeem xws li tsev so, tsev so, tsev kho mob, ntxhua khaub ncaws, thiab lwm yam, lub kaum sab xis tooj dag yog siv los tswj thiab tswj cov kav dej.Nyob rau hauv luv luv, lub kaum sab xis ntawm tooj dag yog lub zog, ruaj khov, txhim khu kev qha, thiab siv tau dav siv hauv cov kav dej uas tuaj yeem tswj tau dej ntws thiab siab, txuag dej, thiab tiv thaiv ib puag ncig.Nws yog ib qho khoom siv tseem ceeb thiab tseem ceeb hauv ntau yam kev lag luam.Cov khoom no muaj daim ntawv pov thawj CE.

  • Brass diverter, Waterway system, Inlet thiab qhov hluav taws xob, Fluid distribution, Corrosion resistance, Durability

    Brass diverter, Waterway system, Inlet thiab qhov hluav taws xob, Fluid distribution, Corrosion resistance, Durability

    Brass diverter yog ib qho cuab yeej siv los faib cov dej hauv cov dej, feem ntau yog ua los ntawm cov khoom siv tooj dag zoo.Nws feem ntau suav nrog ib qho chaw nkag thiab ntau qhov chaw nres nkoj, uas tuaj yeem coj cov dej ntws mus rau cov kav dej sib txawv lossis cov khoom siv.Brass diverters feem ntau yog siv nyob rau hauv ntau yam dej engineering teb vim lawv siab corrosion kuj thiab durability.Daim ntawv thov kev lag luam ntawm tooj dag diverters suav nrog: 1 Cov kav dej xa dej: cov tooj dag diverters tuaj yeem siv dav hauv cov kav dej xa dej kom ua tiav cov dej faib thiab tswj, thiab txhim kho kev ruaj ntseg thiab kev nyab xeeb ntawm cov dej.2. Kev tiv thaiv hluav taws kub: Hauv kev tiv thaiv hluav taws, cov tooj dag diverters feem ntau yog siv los faib cov dej ntws mus rau cov khoom siv tua hluav taws sib txawv lossis txuas hluav taws xob hoses.3. Lub pas dej da dej: Cov neeg ua luam dej tooj dag kuj tuaj yeem siv rau hauv lub pas dej da dej kom faib cov dej ntws mus rau cov khoom siv ua luam dej sib txawv, ua kom cov dej ntws zoo thiab cov dej ruaj khov hauv lub pas dej da dej.4. Rainwater collection system: Brass diverters kuj tuaj yeem siv rau hauv cov kab dej nag los faib thiab tswj cov dej nag, yog li ua kom muaj kev siv ntau tshaj plaws ntawm cov dej nag.Hauv luv luv, tooj dag diverters yog cov cuab yeej siv tau zoo hauv ntau txoj kev hauv dej, uas tuaj yeem ua tiav cov dej faib thiab tswj, txhim kho kev siv tau zoo thiab kev nyab xeeb.Cov khoom no muaj daim ntawv pov thawj CE.