< img qhov siab = "1" dav = "1" style = "display: tsis muaj" src = "https://www.facebook.com/tr?id=3849874715303396&ev=PageView&noscript=1" /> Xov Xwm - Yuav ua li cas ntxuav cov saw hlau tsis tu ncua kom txo qhov cuam tshuam ntawm cov hmoov av

Yuav ua li cas ntxuav cov saw hlau tsis tu ncua kom txo qhov cuam tshuam ntawm cov hmoov av

Yuav ua li cas ntxuav cov saw hlau tsis tu ncua kom txo qhov cuam tshuam ntawm cov hmoov av

Kev Taw Qhia
Raws li ib qho khoom siv kis tau tus mob tseem ceeb hauv cov khoom siv kho tshuab,cov saw hlauCov khoom no siv dav hauv ntau yam lag luam, xws li kev ua zaub mov, kev lag luam tshuaj lom neeg, kev thauj mus los, thiab lwm yam. Txawm li cas los xij, thaum siv tiag tiag, cov saw hlau feem ntau raug xeb thiab cuam tshuam los ntawm hmoov av, uas ua rau lawv hnav sai dua, txo qhov ua haujlwm kis tau zoo, thiab tej zaum yuav ua rau cov khoom siv tsis ua haujlwm. Yog li ntawd, kev ntxuav cov saw hlau tsis tu ncua thiab txo qhov puas tsuaj los ntawm hmoov av yog qhov tseem ceeb heev rau kev txuas lub neej ntawm cov saw hlau thiab xyuas kom meej tias cov khoom siv ua haujlwm ruaj khov. Tsab xov xwm no yuav tshawb nrhiav qhov tseem ceeb ntawm kev ntxuav cov saw hlau kom tob, thiab qhia txog cov txheej txheem thiab kev ceev faj rau kev ntxuav cov saw hlau tsis tu ncua, nrog rau yuav ua li cas xaiv cov tswv yim ntxuav kom raug raws li cov xwm txheej ua haujlwm sib txawv thiab cov yam ntxwv ntawm hmoov av.

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1. Qhov cuam tshuam ntawm cov hmoov av rau ntawm cov saw hlau
Kev hnav sai: Cov hmoov av feem ntau muaj qee qhov tawv. Thaum lub sijhawm ua haujlwm ntawm cov saw hlau, cov hmoov av me me yuav nkag mus rau ntawm ntau qhov ntawm cov saw hlau, xws li qhov chaw sib cuag ntawm tus pin thiab lub tes tsho, thiab lub roller thiab lub tes tsho. Cov hmoov av tawv no yuav ua rau muaj kev sib tsoo ntawm cov chaw hauv kev txav mus los, ua rau cov saw hlau hnav sai dua, ua rau lub suab ntawm cov saw hlau ntev dua, ua rau qhov chaw sib nrug ntau dua, thiab thaum kawg cuam tshuam rau qhov tseeb thiab kev ruaj khov ntawm kev sib kis.
Kev cuam tshuam rau cov nyhuv ntawm lubrication: Lubrication zoo yog ib qho tseem ceeb uas yuav ua kom lub saw hlau ua haujlwm tau zoo. Txawm li cas los xij, qhov lo ntawm cov hmoov av yuav ua rau lubrication ua haujlwm tsis zoo, ua rau nws tsis tuaj yeem tsim cov zaj duab xis zoo sib xws thiab zoo rau ntawm qhov sib txhuam ntawm cov saw hlau. Tom qab cov roj nplua nyeem sib xyaw nrog cov hmoov av, nws yuav dhau los ua viscous lossis tsim cov khoom granular, uas nyuaj rau ntws thiab faib mus rau ntau qhov ntawm cov saw hlau uas xav tau lubrication, yog li ua rau muaj kev sib txhuam ntau ntxiv thiab ua rau lub saw hlau hnav ntau dua.
Ua rau xeb: Qee cov hmoov av yuav muaj cov tshuaj lom neeg ua haujlwm. Thaum lawv lo rau ntawm qhov chaw ntawm cov saw hlau thiab kov cov dej noo lossis lwm yam pa hauv huab cua, cov tshuaj lom neeg yuav tshwm sim los tsim cov tshuaj corrosive. Cov tshuaj corrosive no yuav ua rau cov hlau ntawm cov saw hlau xeb, rhuav tshem cov zaj duab xis tiv thaiv thiab cov qauv ntawm cov hlau, txo qhov muaj zog thiab tawv ntawm cov saw hlau, thiab ua rau nws lub neej ua haujlwm luv dua.
Txo qhov ua tau zoo ntawm kev sib kis: Kev sib sau ua ke ntawm cov hmoov av yuav ua rau muaj kev tiv thaiv kev txav mus los ntawm cov saw hlau, yog li lub cev muaj zog lossis lwm yam khoom siv tsav tsheb yuav tsum siv zog ntau dua los tsav kev ua haujlwm ntawm cov saw hlau, ua rau muaj kev pov tseg zog thiab txo qhov ua tau zoo ntawm tag nrho cov kab ke sib kis.

2. Qhov tseem ceeb ntawm kev ntxuav cov saw hlau tsis tu ncua
Ntev lub neej ua haujlwm: Los ntawm kev ntxuav cov saw hlau tsis tu ncua, cov hmoov av uas lo rau ntawm qhov chaw thiab sab hauv ntawm cov saw hlau tuaj yeem raug tshem tawm zoo, qhov hnav thiab xeb ntawm cov saw hlau los ntawm cov hmoov av tuaj yeem txo qis, thiab cov saw hlau tuaj yeem khaws cia rau hauv qhov zoo, yog li ntawd ntev nws lub neej ua haujlwm thiab txo cov nqi txij nkawm thiab hloov pauv zaus ntawm cov khoom siv.
Xyuas kom meej qhov tseeb thiab ruaj khov ntawm kev sib kis: Cov saw hlau uas tau ntxuav lawm tuaj yeem koom tes zoo dua nrog lub sprocket rau kev sib kis, txo cov saw hlau dhia thiab jamming los ntawm hmoov av, txhim kho qhov tseeb thiab ruaj khov ntawm kev sib kis, xyuas kom meej tias cov khoom siv ua haujlwm ib txwm muaj, thiab zam kev cuam tshuam ntau lawm lossis cov khoom lag luam puas tsuaj los ntawm cov teeb meem sib kis.
Txhim kho kev siv hluav taws xob kom zoo: Txo qhov kev sib sau ua ke ntawm cov hmoov av ntawm cov saw hlau tuaj yeem txo nws qhov kev tiv thaiv kev txav mus los, yog li cov khoom siv tsav tsheb tuaj yeem tsav cov saw hlau kom ua haujlwm tau yooj yim dua, yog li txhim kho kev siv hluav taws xob kom zoo thiab txuag cov nqi hluav taws xob rau cov lag luam.
Tiv thaiv cov khoom siv tsis ua haujlwm: Kev sib sau ua ke ntev ntawm cov hmoov av yuav ua rau muaj kev puas tsuaj loj xws li kub dhau hauv zos, jamming lossis tawg ntawm cov saw hlau. Kev ntxuav cov saw hlau tsis tu ncua tuaj yeem tshawb pom thiab daws cov teeb meem uas yuav tshwm sim, tiv thaiv cov khoom siv tsis ua haujlwm, thiab xyuas kom meej tias kev ua haujlwm txuas ntxiv thiab kev ntseeg siab ntawm kev tsim khoom.

3. Kev ntxuav lub voj voog ntawm cov saw hlau
Yuav kom txiav txim siab seb lub voj voog ntxuav ntawm cov saw hlau yuav tsum tau ua li cas, yuav tsum xav txog ntau yam tseem ceeb:
Ib puag ncig ua haujlwm: Yog tias cov saw hlau nyob hauv ib puag ncig ua haujlwm hnyav nrog cov hmoov av ntau, xws li cov chaw tsuas, cov chaw cog cement, thiab lwm yam, ces lub voj voog ntxuav yuav tsum luv dua; nyob rau hauv ib puag ncig ua haujlwm huv si, lub voj voog ntxuav tuaj yeem txuas ntxiv kom raug.
Kev ua haujlwm ceev thiab lub nra hnyav: Qhov ceev thiab lub nra hnyav ntawm cov saw hlau dov ntau dua, lub voj voog ntxuav luv dua. Vim tias nyob rau hauv qhov ceev ceev thiab hnyav, qhov hnav thiab cuam tshuam ntawm cov hmoov av ntawm cov saw hlau dov hnyav dua, thiab yuav tsum tau ntxuav ntau zaus kom ntseeg tau tias nws ua haujlwm tau zoo.
Lub sijhawm ua haujlwm ntawm cov khoom siv: Rau cov khoom siv uas khiav tas li ntev, cov saw hlau yuav muaj hmoov av ntau dua. Yog li ntawd, lub voj voog ntxuav yuav tsum txiav txim siab raws li lub sijhawm ua haujlwm tiag tiag ntawm cov khoom siv. Feem ntau pom zoo kom ua qhov kev tshuaj xyuas ntxuav tsawg kawg ib zaug hauv ib lub lim tiam thiab kho qhov zaus ntxuav raws li qhov xwm txheej tiag tiag.

4. Kev npaj ua ntej ntxuav cov saw hlau
Npaj cov cuab yeej thiab cov ntaub ntawv ntxuav kom tsim nyog:
Cov tshuaj ntxuav: Xaiv cov tshuaj ntxuav tshwj xeeb rau cov saw hlau. Cov tshuaj ntxuav no muaj peev xwm ntxuav tau cov av qias neeg thiab tiv thaiv kev nplua nplua. Lawv tuaj yeem tshem tawm cov roj thiab cov hmoov av ntawm cov saw hlau, thiab yuav tsis xeb lossis ua puas rau qhov chaw hlau thiab cov roj hmab ntawm cov saw hlau. Tsis txhob siv cov tshuaj ntxuav uas muaj zog xws li cov kua qaub thiab alkalis muaj zog.
Txhuam: Npaj ntau hom txhuam sib txawv, xws li txhuam tawv tawv rau kev tshem tawm cov av tawv ncauj thiab cov khoom txuas rau ntawm qhov chaw ntawm cov saw hlau, thiab txhuam mos mos rau kev ntxuav cov qhov me me thiab cov khoom rhiab heev ntawm cov saw hlau kom tsis txhob khawb qhov chaw ntawm cov saw hlau.
Daim ntaub los yog phuam da dej: Xaiv ib daim ntaub mos mos, tsis muaj plaub los so qhov saum npoo ntawm cov saw hlau thiab nqus cov tshuaj ntxuav thiab cov dej noo ntau dhau.
Cov khoom siv tiv thaiv: Thaum lub sijhawm ntxuav, yuav tsum hnav cov hnab looj tes tiv thaiv, tsom iav thiab lwm yam khoom siv tiv thaiv kom tiv thaiv cov tshuaj ntxuav kom tsis txhob ua rau lub cev tib neeg raug mob, thiab kom tsis txhob ua rau daim tawv nqaij thiab qhov muag khaus los ntawm cov khoom tsis huv xws li hmoov av.
Tshem tawm lub hwj chim thiab xyuas kom muaj kev nyab xeeb: Ua ntej ntxuav cov saw hlau, nco ntsoov tshem tawm lub hwj chim ntawm cov khoom siv thiab dai ib daim ntawv ceeb toom kom tiv thaiv cov khoom siv kom tsis txhob pib ua yuam kev, ua rau raug mob thiab puas tsuaj rau cov khoom siv. Rau qee cov khoom siv loj lossis cov kab ke sib kis nyuaj, nws kuj tseem ceeb heev uas yuav tsum xauv lossis cais cov haujlwm raws li cov txheej txheem kev nyab xeeb kom ntseeg tau tias muaj kev nyab xeeb ntawm kev ntxuav.

5. Cov txheej txheem ntxuav ntawm cov saw hlau
Kev Tshem Tawm thiab Kev Ntxuav: Yog tias cov qauv ntawm cov khoom siv tso cai, cov saw hlau tuaj yeem raug tshem tawm los ntxuav yog tias muaj xwm txheej tso cai. Qhov no tuaj yeem ntxuav tag nrho cov khoom ntawm cov saw hlau, suav nrog cov phaj saw hlau sab hauv thiab sab nraud, cov menyuam, cov koob thiab cov tes tsho kom huv si. Muab cov saw hlau uas raug tshem tawm tso rau hauv cov tshuaj ntxuav tes, muab cov tshuaj ntxuav tes thiab ntxuav nws raws li cov lus qhia rau kev siv cov tshuaj ntxuav tes, thiab tom qab ntawd siv txhuam los txhuam maj mam rau ntawm qhov chaw thiab qhov sib txawv ntawm cov saw hlau kom tshem tawm cov av qias neeg thiab hmoov av tawv ncauj. Tom qab ntxuav, yaug nrog dej huv, tshuab kom qhuav nrog cua compressed lossis ziab ntuj hauv qhov chaw muaj cua zoo, thiab xyuas kom meej tias cov saw hlau qhuav tag ua ntej rov nruab rau ntawm cov khoom siv.
Kev ntxuav online: Rau qee cov saw hlau uas tsis tuaj yeem rhuav tshem lossis tsis yooj yim rau kev rhuav tshem, cov txheej txheem ntxuav online tuaj yeem siv tau. Ua ntej, siv txhuam lossis txhuam mos mos los ntub rau hauv cov tshuaj ntxuav kom zoo thiab txhuam kom huv si ntawm qhov chaw ntawm cov saw hlau, tsom mus rau qhov sib txuas ntawm cov saw hlau thiab cov chaw uas cov hmoov av yooj yim sib sau ua ke. Tom qab ntawd, so nws kom huv si nrog daim ntaub huv lossis phuam so kom tshem tawm cov tshuaj ntxuav thiab av ntawm qhov chaw. Thaum lub sijhawm ntxuav, koj tuaj yeem pib cov khoom siv thiab ua kom cov saw hlau khiav qeeb qeeb kom txhua qhov ntawm cov saw hlau tuaj yeem ntxuav tau kom ntseeg tau tias muaj txiaj ntsig zoo.
Kev ntxuav ultrasonic: Rau qee cov saw hlau uas muaj qhov tseeb thiab xav tau siab, lossis thaum cov saw hlau muaj kuab paug heev, kev ntxuav ultrasonic tuaj yeem siv tau. Muab cov saw hlau rau hauv lub tshuab ntxuav ultrasonic, ntxiv cov tshuaj ntxuav thiab dej kom tsim nyog, thiab ntxuav nws raws li cov txheej txheem ua haujlwm ntawm lub tshuab ntxuav ultrasonic. Kev co siab ntawm cov nthwv dej ultrasonic tuaj yeem tshem tawm cov av thiab hmoov av ntawm qhov chaw thiab sab hauv ntawm cov saw hlau kom ua tiav cov txiaj ntsig ntxuav kom huv si. Kev ntxuav ultrasonic muaj qhov zoo ntawm kev ntxuav zoo thiab ua haujlwm tau zoo, tab sis nws yuav tsum tau sau tseg tias kev ntxuav ultrasonic yuav muaj cov teebmeem tsis zoo rau cov saw hlau ntawm qee yam khoom siv, yog li ua ntej siv, koj yuav tsum xub paub meej tias cov khoom siv ntawm cov saw hlau puas haum rau kev ntxuav ultrasonic.

6. Kev tshuaj xyuas thiab kev saib xyuas tom qab ntxuav
Tshawb xyuas seb cov saw hlau puas hnav: Tom qab ntxuav cov saw hlau, yuav tsum tau kuaj xyuas seb cov saw hlau puas hnav zoo. Tshawb xyuas seb cov pins, tes tsho, cov menyuam thiab cov phaj sab hauv thiab sab nraud puas muaj qhov hnav, hloov pauv, tawg thiab lwm yam teeb meem. Yog tias pom tias cov saw hlau hnav ntau dua li qhov tso cai, yuav tsum tau hloov pauv raws sijhawm kom tsis txhob muaj kev puas tsuaj ntawm cov khoom siv vim yog cov saw hlau hnav ntau dhau. Feem ntau, thaum cov saw hlau ntev dua 3% ntawm qhov ntev qub, yuav tsum xav txog kev hloov cov saw hlau.
Kev Siv Roj Dua: Cov saw hlau yuav tsum tau muab roj ntxiv rau lub sijhawm tom qab ntxuav kom rov qab tau nws lub xeev roj zoo thiab txo qhov kev sib txhuam thiab kev hnav. Raws li cov xwm txheej ua haujlwm ntawm cov saw hlau thiab cov lus pom zoo ntawm cov chaw tsim khoom, xaiv cov roj lossis roj uas tsim nyog. Thaum siv cov roj lubricating, koj tuaj yeem siv cov roj drip, txhuam roj lubrication lossis cov roj da dej lubrication kom ntseeg tau tias cov roj lubricating tuaj yeem faib sib npaug hauv ntau qhov sib txhuam ntawm cov saw hlau; thaum siv cov roj, cov roj yuav tsum tau txhaj rau hauv qhov sib txawv ntawm cov menyuam thiab lub tes tsho ntawm cov saw hlau, thiab sau nws nrog cov roj kom tsim nyog. Ceev faj tsis txhob siv roj ntau dhau kom tiv thaiv cov roj ntau dhau los ntawm kev txaws rau lwm qhov ntawm cov khoom siv, ua rau muaj kuab paug thiab pov tseg tsis tsim nyog.
Tshawb xyuas qhov nro thiab kho nws: Qhov nro ntawm cov saw hlau yog qhov tseem ceeb rau nws txoj haujlwm ib txwm. Tom qab ntxuav thiab lubricating cov saw hlau, xyuas seb nws qhov nro puas ua tau raws li qhov yuav tsum tau ua. Yog tias qhov nro nruj dhau, nws yuav ua rau muaj kev ntxhov siab thiab kev hnav ntawm cov saw hlau thiab siv zog ntau dua; yog tias qhov nro xoob dhau, nws yuav ua rau cov saw hlau plam thiab dhia cov hniav ntawm lub sprocket, cuam tshuam rau kev ruaj khov ntawm kev sib kis. Raws li qhov yuav tsum tau ua ntawm cov khoom siv thiab txoj kev nruj ntawm cov saw hlau, kho qhov nro ntawm cov saw hlau mus rau qhov ntau yam tsim nyog los ntawm kev kho qhov chaw ntawm lub log nruj lossis tus lej ntawm cov txuas saw hlau.

7. Lwm yam kev ntsuas los txo qhov cuam tshuam ntawm cov hmoov av rau ntawm cov saw hlau
Txhim kho qhov chaw ua haujlwm: Ua cov kev ntsuas los txo cov hmoov av hauv qhov chaw ua haujlwm kom ntau li ntau tau, xws li kev teeb tsa lub tshuab cua zoo, cov khoom siv tshem tawm cov hmoov av, thiab lwm yam, kom txo qhov kev yaig ntawm cov hmoov av ntawm cov saw hlau. Rau qee cov khoom siv lossis cov txheej txheem uas tsim cov hmoov av ntau, xav txog kev siv cov qauv kaw lossis cov kev ntsuas cais tawm kom tiv thaiv cov hmoov av kom tsis txhob kis mus rau thaj chaw uas cov saw hlau nyob.
Xaiv cov saw hlau thiab cov khoom siv tiv thaiv zoo: Raws li qhov chaw ua haujlwm thiab cov xwm txheej ua haujlwm ntawm cov khoom siv, xaiv cov saw hlau uas muaj kev ua haujlwm tiv thaiv plua plav, xws li cov saw hlau uas muaj lub cuab yeej kaw lossis cov saw hlau tsis xeb, uas tuaj yeem thaiv cov plua plav nkag thiab txhim kho lub peev xwm tiv thaiv kev ua qias tuaj ntawm cov saw hlau. Tib lub sijhawm, cov khoom siv tiv thaiv xws li cov npog tiv thaiv lossis cov npog kaw tuaj yeem ntsia tau rau sab nraud ntawm cov saw hlau kom txo qhov muaj feem ntawm cov plua plav sib cuag nrog cov saw hlau thiab tiv thaiv cov saw hlau ntawm plua plav.
Txhim kho cov kev ua haujlwm ntawm cov khoom siv: Kho kom zoo cov kev ua haujlwm ntawm cov khoom siv, xws li txo qhov ceev ntawm cov saw hlau thiab txo qhov hnyav, uas tuaj yeem txo qhov cuam tshuam thiab kev hnav ntawm cov hmoov av ntawm cov saw hlau mus rau qee qhov. Tsis tas li ntawd, kev saib xyuas thiab kev saib xyuas tsis tu ncua ntawm cov khoom siv kom ntseeg tau tias qhov kev ua tau zoo ntawm cov khoom siv zoo kuj tseem tuaj yeem txo qhov kev sib sau ua ke ntawm cov hmoov av thiab kev hnyav ntawm cov saw hlau los ntawm kev co, kev co thiab lwm yam teeb meem ntawm cov khoom siv.

8. Cov Lus Nug Feem Ntau
Q: Puas siv tau dej xab npum lossis tshuaj ntxuav tes los ntxuav cov saw hlau?
A: Tsis pom zoo kom siv dej xab npum lossis tshuaj ntxuav tes los ntxuav cov saw hlau. Vim tias cov tshuaj ntxuav no feem ntau yog alkaline heev, lawv tuaj yeem ua rau cov hlau ntawm cov saw hlau xeb, ua rau cov txheej txheem kho saum npoo ntawm cov saw hlau puas tsuaj, thiab ua rau nws xeb thiab hnav sai dua. Thiab lawv lub peev xwm tshem tawm cov kuab paug yuav tsis txaus los ntxuav cov roj thiab cov hmoov av tawv ncauj ntawm cov saw hlau. Yuav tsum xaiv cov tshuaj ntxuav tshwj xeeb rau cov saw hlau kom ntseeg tau tias cov nyhuv ntxuav thiab kev nyab xeeb ntawm cov saw hlau.
Q: Puas yog qhov tsim nyog yuav tsum tau rhuav tshem tag nrho cov saw hlau thaum ntxuav nws?
A: Nws tsis tas yuav tsum tau rhuav tshem tag nrho cov saw hlau. Yog tias cov qauv ntawm cov khoom siv tso cai thiab muaj cov xwm txheej rau kev rhuav tshem thiab ntxuav, ces kev rhuav tshem thiab ntxuav tuaj yeem ntxuav tag nrho cov khoom ntawm cov saw hlau kom huv si; tab sis rau qee cov saw hlau uas tsis yooj yim rau kev rhuav tshem, cov txheej txheem ntxuav online tuaj yeem siv, uas kuj tuaj yeem ua tiav cov txiaj ntsig zoo dua. Hauv kev ua haujlwm tiag tiag, txoj kev ntxuav tsim nyog yuav tsum tau xaiv raws li qhov xwm txheej tshwj xeeb ntawm cov khoom siv thiab qhov yooj yim ntawm kev ntxuav haujlwm.
Q: Puas yog cov saw hlau yuav tsum tau lubricated tam sim ntawd tom qab ntxuav?
A: Yog, cov saw hlau yuav tsum tau muab roj nplua nyeem sai li sai tau tom qab ntxuav. Vim tias cov saw hlau tom qab ntxuav yog nyob rau hauv lub xeev qhuav, tsis muaj kev tiv thaiv ntawm cov roj nplua nyeem, nws yooj yim cuam tshuam los ntawm kev sib txhuam thiab xeb. Kev muab roj nplua nyeem raws sijhawm tuaj yeem muab cov saw hlau nrog cov zaj duab xis roj nplua nyeem tsim nyog, txo qhov kev sib txhuam tsis kam, txo qhov hnav, thiab ntev lub neej kev pabcuam ntawm cov saw hlau. Yog li ntawd, tom qab ntxuav, cov saw hlau yuav tsum tau muab roj nplua nyeem tam sim ntawd raws li qhov xav tau.

9. Xaus Lus
Kev ntxuav cov saw hlau ua lub luag haujlwm tseem ceeb hauv kev ua kom nws ua haujlwm tau zoo thiab txuas ntxiv nws lub neej kev pabcuam. Los ntawm kev nkag siab tob txog qhov cuam tshuam ntawm cov hmoov av rau cov saw hlau, qhia meej txog qhov tseem ceeb ntawm kev ntxuav tas li, thiab kev paub txog cov txheej txheem ntxuav thiab kev ceev faj kom raug, ua ke nrog lwm yam kev ntsuas los txo qhov cuam tshuam ntawm cov hmoov av, peb tuaj yeem txo qhov kev puas tsuaj ntawm cov hmoov av rau cov saw hlau thiab xyuas kom meej tias kev ua haujlwm ruaj khov thiab kev tsim khoom siv tshuab zoo. Ua ib txoj saw hlau, cov hauv qab no yog ib qho piv txwv ntawm ib qho blog ywj pheej ntawm "Yuav ua li cas ntxuav cov saw hlau tsis tu ncua kom txo qhov cuam tshuam ntawm cov hmoov av", uas koj tuaj yeem hloov kho thiab hloov kho raws li qhov xwm txheej tiag tiag.


Lub sijhawm tshaj tawm: Tsib Hlis-28-2025