Taw qhia rau ntshiab tungsten
Ntshiab Tungsten yog cov hlau zoo nkauj nrog cov khoom siv lub cev thiab cov tshuaj chemical. Nws muaj qhov siab tshaj plaws melting point ntawm txhua cov hlau, mus txog kwv yees li 3422 degree, uas ua rau nws tsis tshua muaj siab rau siab- qhov chaw ib puag ncig. Tungsten tseem khav siab ntom ntom ntom, hardness zoo heev, thiab hluav taws xob zoo thiab thermal conductivity. Cov khoom no tau ua rau nws siv thoob plaws hauv ntau yam kev lag luam, xws li Aerospace, khoom siv hluav taws xob, thiab tsim khoom. Hauv Aerospace, ntshiab tungsten yog siv nyob rau hauv rocket nozzles thiab siab - cov khoom kub vim nws lub peev xwm tiv thaiv cua sov. Hauv kev lag luam hluav taws xob, nws tau siv nyob rau hauv kev tsim cov filaments rau cov roj teeb thiab hluav taws xob rau cov khoom siv hluav taws xob.
Tam sim no, cia peb saib ntawm 10 tus ntshiab tungsten manufacturers nyob rau hauv lub ntiaj teb hauv 2025.
1. Luoyang tsis tshua muaj hlau tshawb khoom siv Co., Ltd.
Luoyang tsis tshua muaj hlau tshawb khoom siv Co., Ltd. yog cov kev lag luam uas tsis tshua muaj cov ntaub ntawv hlau tsawg, tshwj xeeb yog hauv kev tsim cov ntshiab tungsten. Lub tuam txhab nyob hauv Luoyang, ib lub nroog uas muaj keeb kwm nplua nuj nyob hauv Metallurgy thiab cov ntaub ntawv kev tshawb fawb hauv Suav teb. Nws muaj lub xeev - - {}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}} Cov neeg ua haujlwm ntawm cov kws tshaj lij, cov kws tshaj lij.
Lub tuam txhab cov txheej txheem ntau lawm rau cov tungsten ntshiab yog raws li cov thev naus laus zis siab. Lawv pib nrog siab - Ua zoo Tungsten Ore, uas yog ua tib zoo xaiv thiab ua tib zoo saib xyuas nrog ine hnav, thiab ua kom huv si. Cov txheej txheem lim dej yog qhov tseem ceeb heev los xyuas kom cov khoom siab siab ntawm cov khoom kawg tungsten khoom. Luoyang tsis tshua muaj hlau tshawb khoom siv xws li tshuaj lom neeg thiab ua tiav qhov siab- kev purity qib ntawm tungsten.
Ib qho ntawm cov tseem ceeb ntawm lub tuam txhab cov khoom ntshiab tungsten cov khoom yog lawv cov kev sib xws nyob hauv qhov zoo. Txhua txhua pob ntawm Tungsten cov khoom lag luam undergoes nruj cov txheej txheem tswj hwm, suav nrog kev soj ntsuam cov tshuaj lom neeg, thiab cov cuab yeej kuaj ntawm lub cev. Qhov no ua kom pom tseeb tias cov khoom ua raws cov qauv kev lag luam thoob ntiaj teb siab tshaj plaws.
Qhov Zoo:
- Advanced Technology: Cov tuam txhab nqis peev ntau rau kev tshawb fawb thiab kev txhim kho kom muaj kev hloov kho tshiab tshiab hauv kev lag luam tungsten. Lawv cov thev naus laus zis ntau lawm tso cai rau lawv los tsim cov siab siab- Zoo ntshiab tungsten cov khoom muaj txiaj ntsig.
- Kev Tswj Xyuas Zoo: Txoj kev tswj nruj ua nruj zoo ua kom ntseeg tau tias cov neeg yuav khoom tau txais cov khoom lag luam ntawm kev ua tau zoo ib yam. Qhov no tau khwv tau lub tuam txhab lub koob npe zoo hauv kev ua lag luam.
- Tib neeg: Libang tsis tshua muaj hlau tshawb khoom siv Co., Ltd. tuaj yeem kho cov khoom ntshiab tungsten cov khoom raws li cov neeg siv khoom tshwj xeeb. Seb nws yog cov duab, loj me, lossis qib siab dawb huv, lub tuam txhab tuaj yeem ntsib cov kev xav tau sib txawv ntawm kev lag luam sib txawv.
Lub Vev Xaib:https://www.xzymetals.com/
2. Plansee Se
Plansee Se yog Austrian -} Bas Raws li cov thawj coj thoob ntiaj teb hauv kev tsim cov hlau, suav nrog ntshiab tungsten. Nrog keeb kwm yos rov qab 100 xyoo, lub tuam txhab muaj kev paub ntau thiab kev tshaj lij hauv thaj teb.
Plansee se muaj cov saw hlau ntau ntau rau cov ntshiab tungsten. Nws pib los ntawm kev txwv ntawm tungsten ore nyob rau hauv nws cov mines lossis los ntawm cov neeg muag khoom kom ntseeg tau. Lub ແ is່ yog tom qab ntawd ua tiav nyob rau hauv nws qib siab tshaj plaws smelting thiab refining cov chaw. Lub tuam txhab siv cov thev naus laus zis tshiab hauv cov txheej txheem ntau lawm, uas tso cai rau kev tswj hwm cov microstructure thiab cov khoom ntawm tungsten cov khoom lag luam.
Lub tuam txhab cov khoom ntshiab tungsten tau dav siv nyob rau hauv high - Tech Industries. Hauv Aerospace sector, plansee cov khoom siv tungsten yog siv hauv qhov tseem ceeb ntawm cov cav dav hlau thiab satellites. Lawv cov khoom yog paub rau lawv lub zog siab, cov kub ua tau zoo heev, thiab qhov ruaj khov sab ruaj khov.
Qhov Zoo:
- Ntev -} sawv kev: Lub tuam txhab ntev li keeb kwm hauv kev lag luam tau muab nws nkag siab tob ntawm kev ua lag luam thiab cov txheej txheem ntau lawm. Qhov kev paub no tso cai rau lawv los tsim cov txiaj ntsig siab- cov khoom lag luam zoo nrog qib siab ntawm kev ntseeg tau.
- Thoob Ntiaj Teb: Plansee Se muaj lub network faib ua haujlwm, uas ua rau nws tau txais cov khoom lag luam kom nrawm rau cov neeg siv khoom thoob ntiaj teb. Lub ntiaj teb no ncav cuag ua lub tuam txhab sib tw hauv kev ua lag luam thoob ntiaj teb.
- Kev Tshawb Nrhiav thiab Kev Loj Hlob: Cov tuam txhab nqis peev nqis hauv R & D los tsim cov khoom lag luam tshiab thiab txhim kho cov kev twb muaj lawm. Lawv cov R & D ua kom pom tseeb txog kev txhim kho cov khoom siv tungsten, xws li nce lawv lub zog {{1} Qhov hnyav} qhov hnyav.
3. HC STARCK GMBH
HC STARCK GMBH GMBH GMBH, tam sim no ib feem ntawm Materion Corporation, yog lub ntsej muag German}}} ua tau zoo li qub, suav nrog ntshiab tungsten.
Lub tuam txhab tsim cov ntshiab tungsten yog tus cwj pwm los ntawm nws qhov siab - precision kev tsim cov txheej txheem. Lawv siv cov kev siv tshuab siab dua los tsim cov khoom siv tungsten nrog cov duab nyuaj thiab nruj nreem. Piv txwv li, hauv kev tsim cov tungsten electrodes rau kev lag luam hluav taws xob, hc starck GmbH tuaj yeem ua tiav cov khoom siv hluav taws xob tsis tshua muaj tseeb ntawm cov khoom siv hluav taws xob.
HC STARCK GMBH kuj tseem tso ntau qhov kev tiv thaiv ib puag ncig hauv nws cov txheej txheem ntau lawm. Lawv tau siv cov kev ntsuas ntsuas kom txo qis kev siv zog thiab txo qis kev khib nyiab ntau tiam. Qhov no tsis tsuas pab tiv thaiv ib puag ncig tab sis kuj txo cov nqi tsim khoom hauv lub sijhawm ntev.
Qhov Zoo:
- Precision Raug: Lub tuam txhab muaj peev xwm tsim cov siab - precision Tungsten Cov khoom uas muaj txiaj ntsig zoo tshaj plaws, xws li cov khoom siv hluav taws xob.
- Kev paub txog ib puag ncig: Lub tuam txhab kev cog lus rau kev tiv thaiv ib puag ncig tsis tsuas yog ua tau raws li kev cog qoob loo ib puag ncig ntawm kev ua lag luam tab sis kuj txhim kho nws cov tub lag luam.
- Kev Txhawb Nqa: HC STARCK GMBH muaj kev txhawb nqa rau nws cov neeg siv khoom. Lawv pab neeg ntawm cov kws tshaj lij tuaj yeem muab cov lus ntuas txog cov khoom xaiv cov khoom, kev thov, thiab kev ua haujlwm, uas pab cov neeg siv khoom lag luam kom tau cov khoom lag luam tshaj plaws.
4. Ntiaj teb Tungsten & PowerDers Corporation
Ntiaj teb Tungsten & Feabders Corporation (GTP) yog ib qho tsim cov khoom lag luam tungsten thiab cov khoom lag luam muaj feem xyuam hauv Tebchaws Meskas.
GTP muaj lub xeev - ntawm -- art hmoov ntau lawm chaw. Lawv cov txheej txheem ntau lawm rau tungsten hmoov yog raws li cov thev naus laus zis ua haujlwm siab. Cov thev naus laus zis no tso cai rau kev tsim cov nplua thiab sib zog ua rau muaj hmoov nrog cov hmoov ntau. Lub tungsten filders produced los ntawm GTP yog siv nyob rau hauv ntau cov ntawv thov, suav nrog hmoov metallurgy, nyuaj alloys, thiab thermal txau.
Lub tuam txhab kuj muaj qhov ua kom muaj zog ntawm kev tswj hwm zoo. Lawv tau ntau txoj kev pom zoo thoob ntiaj teb, uas ua kom ntseeg tau tias lawv cov khoom ua raws cov qauv zoo tshaj plaws. Ntxiv rau, GTP muaj pab pawg R & D tas li ntawm kev txhim kho kev ua tau zoo ntawm nws cov hmoov av tungsten thiab txhim kho cov ntawv thov tshiab.
Qhov Zoo:
- Hmoov ntau yam kev txawj ntse: GTP cov hmoov ntau lawm ntau lawm tshuab muab nws ib qho ntug hauv kev ua lag luam rau tungsten hmoov. Lawv siab {- Cov hmoov zoo yog qhov xav tau ntawm kev lag luam uas cia siab rau cov txheej txheem hmoov metallurgurgy.
- Kev Muaj Peev Xwm Zoo: Lub tuam txhab kev tswj hwm zoo nruj thiab cov ntawv pov thawj thoob ntiaj teb muab cov neeg siv khoom kom muaj kev ntseeg siab ntawm lawv cov khoom.
- Xav tau qhov tshiab: R & D Zus ntawm GTP Pab kom lub tuam txhab nyob ua ntej ntawm kev tsim cov khoom tshiab thiab txhim kho cov hmoov tungsten.
5. Wolfram Bergbau und Hüten AG
Wolfram Bergbau und Hüten AG yog lub tuam txhab Austrian uas tau koom nrog Tungsten Mining thiab kev ua lag luam tau ntau xyoo.
Lub tuam txhab muaj tswv yim nws tus kheej tungsten mines, uas muab nws ruaj khov ntawm raw khoom raw. Qhov kev sib xyaw ntsug no tso cai Wolfram Bergbau und hüten ag kom muaj kev tswj hwm zoo dua qub thiab tus nqi ntawm nws cov khoom ntshiab ntawm cov khoom lag luam. Lub tuam txhab cov txheej txheem ntau lawm suav nrog cov txheej txheem kev sib txuas ua raws li los ntawm cov txheej txheem niaj hnub smelting thiab refining txheej txheem.
Wolfram Bergbau und Hüten AG cov khoom ntshiab tungsten cov khoom yog paub rau lawv cov kev coj dawb huv thiab cov kws kho kom zoo. They are used in a variety of industries, such as the automotive and tool - making industries. Nyob rau hauv kev lag luam automotive, tungsten cov cheebtsam yog siv hauv cov cav qhov chaw thiab cov tshuab coj mus rau lawv lub zog siab thiab hnav tsis kam.
Qhov Zoo:
- Cov Khoom Siv Raw Kev Ruaj Ntseg: Muaj nws tus kheej cov mines ua kom muaj cov khoom siv ruaj khov ntawm cov ore, uas yog qhov tseem ceeb rau kev ua haujlwm siab ntawm cov khoom lag luam siab siab tungsten cov khoom lag luam.
- Kev koom ua ke ntsug: Kev sib koom ua ke ntsug ntawm lub tuam txhab cov qauv lag luam tso cai rau kev tswj hwm tus nqi zoo dua thiab kev tswj hwm zoo thoob plaws hauv cov txheej txheem ntau lawm.
- Kev Tsim Kho Kev Lag Luam: Lub tuam txhab ntev -}}}}}}} lub sij hawm} lub sijhawm kev nkag siab muab nws kev nkag siab tob tob ntawm kev ua lag luam thiab cov txheej txheem ntau lawm, ua rau nws tsim cov khoom lag luam kom tau.
6. Ningxia Orient Tantalum Kev Lag Luam Co., Ltd.
Ningxia Orient Tantal kev lag luam Co., Ltd. yog cov ua lag luam hauv Suav teb tantalum thiab tungsten kev lag luam.
Lub tuam txhab muaj qhov loj - nplai ntau lawm ua haujlwm rau ntshiab tungsten. Lawv cov txheej txheem ntau lawm ua ke ua ke thiab cov thev naus laus zis tshiab. Lawv tau ua kev txhim kho tseem ceeb nyob rau hauv cov txheej txheem lim dej ntawm tungsten, uas tau ua rau lub siab- kev purity qib ntawm lawv cov khoom. Ningxia Orient Tantum Kev Lag Luam Co., Ltd. Kuj muaj cov pab pawg R & D muaj zog ntawm kev tsim tawm tshiab tungsten {}} raws cov ntaub ntawv thiab cov ntawv thov.
Lub tuam txhab cov khoom ntshiab tungsten tau siv dav hauv Suav teb txoj kev ua lag luam hauv tsev thiab kuj tseem xa tawm mus rau ntau lub teb chaws thoob ntiaj teb. Hauv kev ua lag luam Suav, lawv cov khoom siv hauv kev lag luam xws li lub zog, tshuab, thiab hluav taws xob.
Qhov Zoo:
- Loj - nplai ntau lawm: Lub tuam txhab loj - nplai ntau lawm ntim tso cai rau qhov siab heev ntawm cov khoom ntshiab tungsten, uas tuaj yeem ntsib qhov loj- nplai xav tau ntau yam lag luam.
- R & D Zuag: Cov tuam txhab R & D tau ua rau lub tuam txhab ua lag luam txuas ntxiv thiab tsim cov khoom lag luam tshiab, uas yuav pab tswj nws kev sib tw hauv kev ua lag luam.
- Nyeg thiab thoob ntiaj teb kev lag luam: Lub tuam txhab muaj qhov muaj nyob hauv ob qho tib si kev lag luam hauv tsev thiab thoob ntiaj teb uas muab nws cov neeg siv khoom dav dav thiab ntau cov haujlwm ua lag luam.
7. Umicore Cov Ntaub Ntawv Tshwj Xeeb
Umicore cov ntaub ntawv tshwj xeeb yog lub tuam txhab thoob ntiaj teb uas koom nrog hauv kev tsim cov ntaub ntawv siab tshaj, suav nrog tus ntshiab tungsten.
Lub tuam txhab kev tsim cov ntshiab tungsten yog raws li txoj kev ua kom ruaj khov. Lawv tsom mus rau kev rov ua dua cov khoom siv pov tseg, uas tsis yog tsuas yog pab kom txuag tau cov khoom siv ntuj tab sis kuj yuav txo cov kev tsim khoom ntawm ib puag ncig. Umicore cov ntaub ntawv tshwj xeeb siv tau cov thev naus laus zis kom rho tawm thiab huv tungsten los ntawm ntau cov khoom khib nyiab, xws li cov khoom siv tsis muaj nqi thiab pov tseg hauv hluav taws xob.
Lub tuam txhab cov khoom ntshiab tungsten tau siv nyob rau hauv high -}}}}}} application applications, xws li nyob rau hauv lub semiconductor thiab aerospace kev lag luam. Lawv cov khoom paub rau lawv cov kev coj dawb huv thiab kev ua tau zoo hauv kev xav tau ib puag ncig.
Qhov Zoo:
- Kev Siv Kom Muaj Ntau Lawm: Lub tuam txhab ua kom pom tseeb rau cov txheej txheem kev ua dua tshiab thiab cov txheej txheem tsim ntau lawm yog txoj kab nrog lub ntiaj teb kev tiv thaiv thiab kev txuag ib puag ncig. Qhov no muab nws rau kev sib tw kom zoo dua hauv kev ua lag luam.
- High -}} end application application: Umicore cov ntaub ntawv tshwj xeeb 'muaj peev xwm tsim cov siab {{}}}}}} kev lag luam zoo nrog high- nyiaj tau qhab nia siab.
- Ntiaj Teb R & D Network: Lub tuam txhab muaj lub ntiaj teb R & D network, uas ua rau nws nkag mus saib cov kev tsim ub tshiab tshiab thiab sib koom tes nrog cov chaw tshawb fawb thoob ntiaj teb.
8. Tuam Tshoj Tungsten Siab Siab- Tech Group Co., Ltd.
Tuam Tshoj Tungsten Siab Siab - Tech Group Co., Ltd. yog ib qho ntawm cov khoom lag luam loj tshaj plaws hauv Suav teb.
Lub tuam txhab muaj kev ua tiav txoj saw rau tungsten ntau lawm, los ntawm kev sib sau thiab cov neeg tau txais txiaj ntsig rau smelting, kev ua lag luam, thiab khoom lag luam. Qhov no muaj cov saw muaj kev muaj kev sib koom ua ke zoo dua thiab cov khoom siv tau zoo dua. Tuam Tshoj Tungsten Siab Siab- Tech Group Co., Ltd. Muaj ntau cov cuab yeej tsim khoom thiab cov kws tshaj lij R & D pab neeg.
Lub tuam txhab cov khoom ntshiab tungsten cov khoom npog muaj ntau hom, suav nrog cov pas nrig tungsten, xaim, cov phaj, thiab hmoov. Cov khoom no yog siv rau hauv ntau yam kev lag luam, xws li kev ua tub rog, lub zog, thiab kev thauj mus los hauv tsheb thauj.
Qhov Zoo:
- Tiav Tiav Saw: Lub tuam txhab ua tiav txoj saw muaj muab nws muaj zog sib tw ua kom tau txais txiaj ntsig zoo ntawm cov nqi tswj, kev tswj hwm zoo, thiab khoom siv khoom lag luam.
- Loj - nplai ntau lawm muaj peev xwm: Nrog nws loj - Cov tuam txhab ntau lawm, lub tuam txhab tuaj yeem ntsib cov loj- teev tau thov ntawm cov lag luam sib txawv ob qho tib si hauv Suav teb thiab txawv teb chaws.
- Kev Lag Luam Kev Lag Luam: Raws li ib qho ntawm cov coj tungsten cov lag luam hauv Suav teb, Tuam Tshoj Tungsten Siab High {}} Tech Group Co., Ltd. Muaj ib qho cuam tshuam loj ntawm kev ua lag luam thiab thoob ntiaj teb.
9. Sandvik AB
Sandvik AB yog lub tuam txhab Swedish multinational conpectory
Lub tuam txhab tsim cov khoom ntshiab tungsten cov khoom yog ze rau nws cov cuab tam - kev ua lag luam. Lawv siv tungsten hauv kev tsim cov cuab yeej, xws li hnyiab thiab milling cutters. Sandvik Ab tau tsim cov thev naus laus zis rau nws lub tungsten {{3} txhim kho cov cuab yeej thiab kev pabcuam lub neej ntawm cov cuab yeej.
Sandvik Ab kuj muaj qhov tseeb rau cov neeg siv khoom. Lawv ua haujlwm ze nrog cov neeg siv kom nkag siab txog lawv cov kev xav tau thiab muab cov kev daws teeb meem customized. Lawv lub ntiaj teb kev pabcuam network kom cov neeg muas zaub tuaj yeem tau txais kev txhawb nqa raws sijhawm thiab saib xyuas lawv cov khoom lag luam.
Qhov Zoo:
- Cuab Tam -} ua exintrise: Lub tuam txhab ntev -}}}}}}}}}}} Cov ntaub ntawv thov hauv cov cuab yeej siv hauv tuam txhab. Qhov no tso cai rau lawv los tsim kev siab- kev ua haujlwm cuab yeej.
- Txheej Tshuab Tshuab: Cov txheej txheem txheej txheem thev naus laus zis tsim los ntawm Sandvik A Siab txhim kho kev ua tau zoo ntawm lawv cov tungsten {}}} yog ib qho kev sib tw zoo hauv kev ua lag luam khoom.
- Cov Kev Pabcuam Cov Neeg Siv Khoom: Lub tuam txhab cov kev pabcuam zoo tshaj plaws pab tsim kom ntev -} lub sij hawm kev sib raug zoo nrog cov neeg siv khoom txaus siab.
10. HITACHI METALS, LTD.
HITACHI cov hlau, Ltd. yog ib lub tuam txhab Japanese uas tau koom nrog hauv kev tsim cov ntaub ntawv siab, suav nrog ntshiab tungsten.
Lub tuam txhab ntau lawm cov ntshiab tungsten yog tus cwj pwm los ntawm nws qhov siab - Tech ua cov txheej txheem. Lawv siv cov txuj ci siab xws li hluav taws xob nqaj melting thiab kub isostatic nias los tsim cov khoom siv ntom ntom thiab cov kws kho tshuab siab. HITACHI METALS, LTD. Tseem coj kev tshawb fawb ntau ntxiv rau ntawm daim ntawv thov ntawm cov chaw tshiab, xws li hauv kev txhim kho ntawm cov khoom siv hluav taws xob.
Lub tuam txhab cov khoom ntshiab tungsten tau siv nyob rau hauv high - kev lag luam tech hauv Nyij Pooj thiab thoob ntiaj teb. Hauv kev lag luam hluav taws xob, lawv cov khoom lag luam tungsten tau siv nyob rau hauv semiconductor manufacturing khoom thiab siab- zaus khoom siv.
Qhov Zoo:
- High - Tech raug: Lub tuam txhab cov txheej txheem tsim txiaj tau pub nws tsim cov siab -}}}}}}}} tech kev lag luam.
- Tshawb nrhiav ntawm cov ntawv thov tshiab: HITACHI METALS, LTD. Kev tshawb fawb ntawm cov ntawv thov tshiab ntawm Tungsten pab kom nthuav kev ua lag luam rau nws cov khoom lag luam thiab nyob tom ntej ntawm kev tsim tawm thev naus laus zis.
- Kev lig kev cai Japanese: Lub tuam txhab ua kom zoo rau lub siab {{0} Cov qauv zoo uas cuam tshuam nrog kev tsim kho Japanese, uas muab cov qhua tuaj yeem ua rau muaj kev ntseeg tau ntawm nws cov khoom.
Lub ntsiab
Lub 10 ntshiab tungsten cov tuam ntxhab sau saum toj no yog nyob rau ntawm lub ntiaj teb tungsten kev lag luam hauv 2025. Txhua lub tuam txhab muaj nws tus kheej cov cim tshwj xeeb thiab cov txiaj ntsig. Qee cov tuam txhab, zoo li Luoyang tsis tshua muaj cov khoom siv hlau tshawb nrhiav Co., Ltd. Lwm tus, xws li AwaySee Se thiab Sandvik AB, tau ntev - sawv ntsug kev thiab muaj chaw nyob hauv ntiaj teb. Cov tuam txhab nyiam cov ntaub ntawv tshwj xeeb yog coj txoj kev hauv kev tsim khoom.
Cov chaw tsim khoom no ua haujlwm hauv lub luag haujlwm tseem ceeb hauv kev sib ntsib ntawm kev cog qoob loo rau kev lag luam ntshiab hauv ntiaj teb. Lawv cov kev txhim kho tshiab thiab kev txhim kho hauv cov thev naus laus zis ntau lawm, kev tswj hwm kev tsim nyog, thiab kev thov kev tsim kho tsav tsheb txuas ntxiv ntawm kev lag luam tungsten ntxiv yav tom ntej. Raws li qhov kev thov rau siab - Kev ua haujlwm cov ntaub ntawv hauv kev lag luam xws li Aerospace, thiab lub zog ntshiab txuas ntxiv, cov khoom siv hluav taws xob nce ntxiv, cov khoom siv ntshiab txuas ntxiv ntxiv rau cov neeg ua lag luam hauv ntiaj teb.
