Tuam txhab Profile
Lub tuam txhab thaj chaw tsim khoom npog thaj tsam ntawm 40000 square metres thiab muaj yim lub rooj cob qhia raws li cov txheej txheem tsim khoom, suav nrog kev sib tsoo rhiav, batch rhiav, molding rhiav, sib koom ua ke rhiav, ziab rhiav, kev hloov kho rhiav, kev cob qhia cov khoom tiav, thiab kev cob qhia tu.
Peb muaj cov cuab yeej loj - xws li cov khoom sib tov, crushers, hydraulic presses, sintering furnaces, txiav tshuab, tsim tshuab, docking tshuab, thiab ntau yam khoom siv kuaj thiab tshuaj xyuas. Cov chaw kho vajtse no muab kev lees paub rau lub tuam txhab automation thiab loj - teev ntau lawm.
Tau ntau xyoo, lub tuam txhab tau cog lus rau kev tshawb fawb thiab kev loj hlob ntawm siab - kub cua sov cov khoom siv technology thiab lwm yam kev lag luam, tsis tu ncua kev txhim kho cov khoom zoo, accumulating nplua nuj kev tsim, muaj zog technical zog, advanced txheej txheem txheej txheem, ua tiav kev ruaj ntseg system, thiab scientific tswj hom, muab siab - cov khoom zoo thiab cov kev pab zoo meej rau domestic thiab txawv teb chaws cov neeg muas zaub.
Vim Li Cas Xaiv Peb
Peb lub Hoobkas
Lub tuam txhab thaj chaw tsim khoom npog thaj tsam ntawm 40000 square metres thiab muaj yim lub rooj cob qhia raws li cov txheej txheem tsim khoom, suav nrog kev sib tsoo rhiav, batch rhiav, molding rhiav, sib koom ua ke rhiav, ziab rhiav, kev hloov kho rhiav, kev cob qhia cov khoom tiav, thiab kev cob qhia tu.
Cov khoom siv ntau lawm
Peb muaj cov cuab yeej loj - xws li cov khoom sib tov, crushers, hydraulic presses, sintering furnaces, txiav tshuab, tsim tshuab, docking tshuab, thiab ntau yam khoom siv kuaj thiab tshuaj xyuas. Cov chaw kho vajtse no muab kev lees paub rau lub tuam txhab automation thiab loj - teev ntau lawm.
Kev tsim khoom nplua nuj
Tau ntau xyoo, lub tuam txhab tau cog lus rau kev tshawb fawb thiab kev loj hlob ntawm siab - kub cua sov khoom siv technology thiab lwm yam kev lag luam, tsis tu ncua kev txhim kho cov khoom zoo, accumulating nplua nuj kev tsim, muaj zog technical zog, advanced cov txheej txheem, ua tiav kev ruaj ntseg system thiab scientific tswj hom, muab siab - cov khoom zoo thiab cov kev pab zoo meej rau cov neeg siv khoom hauv tsev thiab txawv teb chaws.
Kev tsim khoom lag luam
Cov khoom raug xa tawm mus rau ntau qhov chaw ntawm lub tebchaws thiab xa tawm mus rau ntau tshaj kaum lub tebchaws thiab cheeb tsam xws li Kaus Lim Qab Teb, Nyiv, Thaib, Is Nrias teb, thiab lwm yam, thiab muaj kev ntseeg siab los ntawm cov neeg siv khoom. Tam sim no, lub tuam txhab muaj ntau yam khoom tau dhau ISO9001 thoob ntiaj teb zoo system ntawv pov thawj.
Alumina hollow sphere cib feem ntau yog ua los ntawm alumina hollow spheres thiab alumina hmoov, ua ke nrog lwm cov binders, thiab raug rho tawm haujlwm ntawm 1750 degrees Celsius. Nws yog ib hom hluav taws xob- txuag cov ntaub ntawv rwb thaiv tsev rau ultra- cov ntaub ntawv kub.
Mullite cib hais txog lub siab alumina refractory khoom nrog mullite ua lub ntsiab siv lead ua theem. Cov ntsiab lus ntawm alumina dav dav yog nyob nruab nrab ntawm 65% thiab 75%. Ntxiv rau mullite, cov zaub mov uas muaj cov ntsiab lus alumina qis kuj tseem muaj me me ntawm iav theem thiab orthoclase; Cov uas muaj cov ntsiab lus alumina siab dua kuj muaj me me ntawm corundum. Feem ntau yog siv rau kub moj tej tawg qhov cub sab saum toj, moj tej tawg rauv lub cev thiab hauv qab, iav melting rauv kub cia chamber, ceramic sintering kiln, tuag kaum sab hauv ntawm roj av cracking system, thiab lwm yam.
Mullite cib hais txog lub siab alumina refractory khoom nrog mullite ua lub ntsiab siv lead ua theem. Cov ntsiab lus ntawm alumina dav dav yog nyob nruab nrab ntawm 65% thiab 75%. Ntxiv rau mullite, cov zaub mov uas muaj cov ntsiab lus alumina qis kuj tseem muaj me me ntawm iav theem thiab orthoclase; Cov uas muaj cov ntsiab lus alumina siab dua kuj muaj me me ntawm corundum. Feem ntau yog siv rau kub moj tej tawg qhov cub sab saum toj, moj tej tawg rauv lub cev thiab hauv qab, iav melting rauv kub cia chamber, ceramic sintering kiln, tuag kaum sab hauv ntawm roj av cracking system, thiab lwm yam.
Alumina hollow sphere cib feem ntau yog ua los ntawm alumina hollow spheres thiab alumina hmoov, ua ke nrog lwm cov binders, thiab raug rho tawm haujlwm ntawm 1750 degrees Celsius. Nws yog ib hom hluav taws xob- txuag cov ntaub ntawv rwb thaiv tsev rau ultra- cov ntaub ntawv kub.
Alumina hollow sphere cib feem ntau yog ua los ntawm alumina hollow spheres thiab alumina hmoov, ua ke nrog lwm cov binders, thiab raug rho tawm haujlwm ntawm 1750 degrees Celsius. Nws yog ib hom hluav taws xob- txuag cov ntaub ntawv rwb thaiv tsev rau ultra- cov ntaub ntawv kub.
Thaum tshav kub kub Resistant cib
Alumina hollow sphere cib feem ntau yog ua los ntawm alumina hollow spheres thiab alumina hmoov, ua ke nrog lwm cov binders, thiab raug rho tawm haujlwm ntawm 1750 degrees Celsius. Nws yog ib hom hluav taws xob- txuag cov ntaub ntawv rwb thaiv tsev rau ultra- cov ntaub ntawv kub.
Alumina hollow sphere cib feem ntau yog ua los ntawm alumina hollow spheres thiab alumina hmoov, ua ke nrog lwm cov binders, thiab raug rho tawm haujlwm ntawm 1750 degrees Celsius. Nws yog ib hom hluav taws xob- txuag cov ntaub ntawv rwb thaiv tsev rau ultra- cov ntaub ntawv kub.
Alumina hollow sphere cib feem ntau yog ua los ntawm alumina hollow spheres thiab alumina hmoov, ua ke nrog lwm cov binders, thiab raug rho tawm haujlwm ntawm 1750 degrees Celsius. Nws yog ib hom hluav taws xob- txuag cov ntaub ntawv rwb thaiv tsev rau ultra- cov ntaub ntawv kub.
Kiln Refractory Cib yog dab tsi
Kiln refractory cib yog tsim los ntawm txhuas oxide cov ntsiab lus thiab lwm yam ntaub ntawv los ntawm kub kub firing thiab molding thiab tom qab txias thaum kawg ua tus zoo li tus refractory hluav taws cib rau resisting kub nyob rau hauv tag nrho cov hom ntawm kilns raws li txawv refractory bricks 's txawv daim ntawv thov zog.
Qhov zoo ntawm Kiln Refractory Bricks
Kev tiv thaiv rau qhov kub thiab txias
Lub kiln refractory cib yuav tsum tiv taus qhov kub thiab txias uas tuaj yeem kov yeej hauv cov xwm txheej tsis zoo nrog rau cov uas yeej nyob rau hauv ib txwm muaj nyob rau hauv cheeb tsam uas nws tau siv. Tsis tsuas yog nws yuav tsum muaj peev xwm tiv taus qhov kub thiab txias yam tsis muaj melting, nws kuj yuav tsum tswj nws cov qauv lub zog ntawm qhov kub thiab txias hauv qab nws cov ntsiab lus melting thiab yuav tsum tuav lub ntim tas li thaum raug rau lub sij hawm ntev mus rau qhov kub siab.
Spalling kuj
Txhua lub qhov cub kaw, pib- nce, lossis kev ua haujlwm ntxhov siab feem ntau ua rau muaj qhov kub thiab txias hloov pauv hauv qhov cub, thiab cov kiln refractory cib yuav tsum muaj qhov tsim nyog poob siab los tiv thaiv qhov kub hloov pauv. Tsis muaj qhov zoo no tuaj yeem ua rau lub cib tawg. Cov kab nrib pleb no, feem ntau hu ua spalling, tsim nyob rau hauv txoj kab rov tav ntawm lub cib. Spalling tshwm sim los ntawm thermal shock. Tib cov tshuaj tiv thaiv tuaj yeem pom nrog lub khob haus: Yog tias peb muab lub khob txias rau hauv dej kub heev, thermal shock ua rau lub khob tawg.
Resistance rau tshuaj tua kab mob (slag resistance)
Thaum lub sij hawm tus txheej txheem ntawm clinkerizing, tshauv, slag, thiab vapors tsim thaum lub sij hawm combustion txheej txheem tuaj yeem tua cov refractory cib, reacting chemically nrog cib, nyob ntawm seb hom roj siv. Tsis tas li ntawd, cov plua plav thiab alkalies nkag mus rau hauv cov pa roj carbon monoxide tuaj yeem ua raws li cov cib hauv qhov chaw kub hnyiab thiab cuam tshuam nrog cov cib refractory cib. Lub peev xwm ntawm qhov cub refractory cib los tiv thaiv cov tshuaj tua kab mob hu ua nws cov slag kuj. Ib lub cib uas tsis muaj qhov kev tiv thaiv no tuaj yeem ua rau tsis muaj zog los ntawm kev tawm tsam tshuaj lom neeg, ua rau lub sijhawm ntxov ntawm cov refractory cib tsis ua haujlwm.
Abrasion tsis kam
Cov xwm txheej tau ntsib nyob rau hauv lub teb kiln ua rau nws tsim nyog tias cov kiln refractory bricks tiv taus cov abrasive kev txiav txim los ntawm zawv zawg kiln pub txaj thiab kuj los ntawm plua plav nkag mus rau hauv cov pa txav mus. Qhov kev tiv thaiv kev puas tsuaj no yog qhov yuav tsum tau ua ua ntej rau tag nrho cov cib ntsia rau pem hauv ntej thiab tom qab ntawm qhov chaw kub hnyiab uas txheej tsis feem ntau tsim.
Coatability
Ib qho ntawm qhov tseem ceeb tshaj plaws uas yuav tsum tau muaj los ntawm qhov cub refractory cib nyob rau hauv qhov chaw kub kub uas muaj qhov kub siab tshaj plaws, yog nws lub peev xwm los ua cov txheej txheem zoo thiab tuav cov txheej no rau lub sijhawm ntev. Ib yam li cov kiln refractory bricks ua raws li kev tiv thaiv rau lub kiln -plhaub, yog li cov txheej hauv tum ua raws li kev tiv thaiv. Rau cov kiln refractory cib, yog li pab kom ntev lub neej ntawm cib nyob rau hauv qhov chaw kub.
Hom Kiln Refractory Cib
Hluav taws kub av nplaum cib
Ua los ntawm cov av nplaum ntxhia, cov cib no tsim nyog rau kev siv qis dua. Lawv muab kev tiv thaiv zoo rau thermal poob siab thiab raug nqi - zoo.
High-alumina cib
Cov cib no yog tsim los ntawm alumina (al2o3) thiab muaj kev tiv thaiv zoo rau qhov kub thiab txias, puas, thiab tshuaj tua kab mob. Lawv yog cov zoo tagnrho rau kilns khiav ntawm nruab nrab mus rau high kub.
Silica cib
Ua los ntawm silica (sio2), cov cib no tiv taus cov thermal shock thiab acidic ib puag ncig. Lawv feem ntau siv hauv iav thiab ceramic kiln.
Magnesite bricks
Magnesite bricks, muaj li ntawm magnesium oxide (mgo), muaj kev tiv thaiv zoo heev rau alkaline ib puag ncig thiab kub kub. Lawv feem ntau siv rau hauv cement thiab steel kev lag luam kiln.
Thaum twg Kiln Refractory Cib xav tau nyob rau hauv Rotary Kiln?
Kiln refractory cib siv qhov kub thiab txias los ua kom muaj tshuaj lom neeg los yog hloov lub cev ntawm cov khoom. Feem ntau, cov kev khiav hauj lwm kub no yuav ua kom puas lub plhaub tsis muaj kev tiv thaiv tam sim ntawd. Vim li no, refractory yog siv.
Tsuas yog ncaj qha - cov hluav taws kub refractory cib siv refractory. Hauv qhov tsis ncaj-kis, hloov hluav taws xob feem ntau tshwm sim los ntawm cov phab ntsa ntawm lub plhaub, yog li refractory yuav yog lwm qhov thaiv kom sov kom dhau mus ua ntej nws nyob rau hauv kev sib cuag nrog cov khoom, txo qhov ua tau zoo ntawm cov txheej txheem. Vim li no, es tsis txhob siv refractory, tsis ncaj - cov hluav taws kub hnyiab feem ntau cia siab rau lub tshav kub ntau dua - lub plhaub resistant.
Ntxiv rau qhov xav tau rau refractory, ncaj qha - cov hluav taws kub hnyiab feem ntau tsis siv cov combustion chamber, yog li cov nplaim hluav taws kub hnyiab tas li nrog cov khoom sab hauv. Cov nplaim hluav taws kub tuaj yeem nyob qhov twg ntawm 1600 - 3200℉ (nyob ntawm huab cua ntau dhau) - qhov chaw ua haujlwm hnyav uas cov hlau tsis muaj peev xwm tiv taus.
Kev tiv thaiv lub plhaub kiln yog qhov tseem ceeb rau kev ua kom lub neej ntev ntawm cov khoom siv; ib qho kev kho loj lossis tag nrho kev hloov ntawm lub plhaub yog ib qho kev ua haujlwm loj heev, yuav tsum tau ua haujlwm loj thiab cov nqi kho. Vim li no, xaiv txoj cai refractory configuration thiab kev ntsuas los tiv thaiv refractory thaum ua haujlwm tseem ceeb heev.
Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias thaum lub hom phiaj tseem ceeb ntawm refractory yog los tiv thaiv lub plhaub kiln, refractory kuj tseem ua haujlwm kom txo qhov kub poob. Lub qhov cub nrog sub-par refractory tuaj yeem tiv thaiv lub plhaub ntawm lub qhov cub, tab sis tso cai rau cov cua sov tseem ceeb, txo cov txheej txheem tag nrho thiab nce nqi ua haujlwm.
Los ntawm peb cov kev tshawb fawb txog kev puas tsuaj ntawm cov rotary kiln refractories, peb txiav txim siab tias cov refractory hauv ob sab phlu nrog cov khoom zoo yuav tsum ua tau raws li cov hauv qab no: Muaj zog tiv thaiv rau siab - kub clinker thiab alkali ntsev yaig. Zoo structural toughness tiv thaiv thermal stress thiab mechanical stress.
Cov khoom siv cib ua tau raws li qhov xav tau ntawm ib puag ncig. Tsis tas li ntawd, peb yuav tsum muab cov qauv ntawm cov cement rotary kiln xaiv cov cib refractory. Cov cement rotary kiln feem ntau tuaj yeem muab faib ua thaj chaw ua ntej cua sov, thaj chaw hloov pauv qis, thaj chaw hloov pauv sab saud, thaj chaw sintering, thiab thaj chaw txias. Qhov ntev, qhov kub thiab txias, thiab kev ua haujlwm ntawm txhua cheeb tsam sib txawv, yog li kev xaiv ntawm refractory hauv ob sab phlu yuav tsum ua tau raws li qhov yuav tsum tau muaj ntawm txhua cheeb tsam.
Preheating cheeb tsam
Phosphate siab-alumina cib, tiv thaiv- stripping alumina cib, thiab alkali-cov cib resistant feem ntau yog siv nyob rau hauv cheeb tsam no.
Kev hloov chaw qis dua
Qhov kub hauv cheeb tsam no kuj qis, yog li thermal conductivity ntawm refractory cib yuav tsum tau qis. Ob qho tshuaj tiv thaiv - stripping alumina cib thiab silicon mullite cib feem ntau siv nyob rau hauv cheeb tsam no. Ntawm ob lub cib, qhov kev ua tau zoo ntawm silica mullite cib yog qhov zoo dua, nws lub neej kev pabcuam yog li 1 lub sijhawm ntev dua li cov anti-spalling siab alumina cib, tab sis tus nqi yog li 1.5 npaug ntau dua.
Upper kev hloov chaw
Cov txheej txheej tsim nyob rau hauv cheeb tsam no tsis ruaj khov, lub hauv ob sab phlu yuav tsum muaj thermal poob siab zoo, tsis tshua muaj thermal conductivity, thiab muaj zog hnav tsis kam.
Magnesia alumina spinel cib yog qhov kev xaiv zoo, tab sis nws cov thermal conductivity yog qhov siab. Los ntawm qhov sib piv, qhov hnav tsis kam thiab kev ua haujlwm tag nrho ntawm silica-alumina cib yog sib npaug rau magnesia alumina spinel cib, thiab nws cov thermal conductivity tsawg.
Sintering cheeb tsam
Qhov chaw sintering muaj qhov kub thiab txias thiab cov tshuaj tiv thaiv hnyav heev, lub hauv paus cib nyob rau hauv cheeb tsam no yuav tsum muaj lub peev xwm tiv taus qhov yaig ntawm clinker, so3, thiab co2.
Magnesia-chrome cib muaj qhov ua haujlwm tsis zoo thiab yooj yim rau kev hnov mob nrog clinker los tsim cro3, ua rau lub neej luv luv. Feem ntau siv magnesia hlau spinel cib muaj cov txiaj ntsig zoo tab sis tus nqi siab. Yog li ntawd, kev txiav txim siab zoo, peb tau zoo dua xaiv periclase spinel compound cib hauv thaj chaw no.
Qhov chaw txias
Qhov kub thiab txias hloov tau zoo heev nyob rau hauv cheeb tsam no thiab txheej txheej tsis ruaj khov. Lub rotary kiln refractory hauv ob sab phlu yuav tsum hnav- tiv taus thiab muaj thermal shock kuj zoo heev thiab thermal conductivity tsawg. Nyob rau hauv xyoo tas los no, peb feem ntau siv silicon mullite cib thiab anti- stripping abrasive cib.
Kev ceev faj rau Kiln Refractory Cib
Vim tias qhov kub tsis txaus ntseeg uas cov cib refractory yuav tsum tau nrog, lawv yuav tsum tsis txhob raug thawb kom sov lossis txias sai heev. Qhov no tuaj yeem ua rau thermal shock, thiab ua rau cov cib tawg los yog tev tawm ntawm lub plhaub. Txhua lub sijhawm lawv hloov kub sai, kev puas tsuaj ntau dua yuav ua tiav. Yog li ntawd, cov neeg ua haujlwm kiln yuav tsum nco ntsoov paub txog qhov muaj peev xwm ua rau muaj kev puas tsuaj ntawm no. Cia koj lub qhov cub maj mam ua kom sov, lossis txias, kom ntev lub neej ntawm cov cib.
Qhov zoo tshaj plaws, thaum lub kiln tig, nws yuav tsum tig kom du thiab huv li sai tau. Qhov no yog qhov xav tau rau ntau qhov laj thawj - suav nrog kev tiv thaiv thekiln refractory cib. Kev sib hloov tsis sib xws, xws li yog lub plhaub kiln tau dhau los ua warped, yuav ua rau muaj kev ntxhov siab ntxiv rau ntawm cov cib. Cov neeg nyob ze rau thaj tsam warped ntawm lub plhaub yuav tawg los yog tev tawm. Dhau li ua mob rau lub qhov cub, nws tseem yuav ua kom puas tsuaj rau thaj tsam ntawm lub plhaub. Qhov no tsuas yog ib qho laj thawj uas koj lub qhov cub yuav tsum tau ntsuas tsis tu ncua thiab sib npaug.
Thaum koj hlawv roj hauv koj lub qhov cub, nws tsim cov pa taws thiab lwm yam khoom siv los ntawm cov cib. Yog tias muaj ntau hom roj sib txawv raug hlawv, qhov no tuaj yeem tsim cov txheej txheem tsis tu ncua ntawm cov cib - lossis tejzaum nws tsim tau lwm yam teebmeem. Ntau npaum li qhov ua tau, khaws koj cov khoom siv roj sib xws kom cov cib tau txais kev pom zoo rau cov khoom siv roj.
Yuav ua li cas kom tsis txhob muaj Corrosion ntawm Kiln Refractory Cib
Slag kuj hais txog lub peev xwm ntawm cov ntaub ntawv refractory los tiv thaiv tshuaj tua kab mob. Lub slag kuj tseem ceeb heev thaum thawj txheej ntawm lub kiln crust yog tsim thiab thaum cov khoom yog viscous heev los yog thaum lub zos kub kub ua rau lub kiln crust poob.
Porosity thiab thermal conductivity ua lub luag haujlwm tseem ceeb hauv kev tsim thawj txheej ntawm kiln crust. Thaum lub kiln crust ntawm lub teb kiln refractory hauv ob sab phlu yog ib nrab tev tawm, lub refractory nrog ntau dua porosity thiab thermal conductivity yuav pab lub kiln crust yuav tsum tau kho nyob rau hauv lub sij hawm. Tab sis nyob rau tib lub sijhawm, nws yuav ua rau muaj kev puas tsuaj loj, ua rau cov txheej nyias nyias ntawm refractory cib kom tev tawm.
Qhov hloov pauv ntawm cov khoom siv raw khoom noj yog qhov teeb meem ntau dua rau cov kiln refractory cib. Thaum muaj cov khoom siv ntau dhau ntawm lub qhov cub, qhov tso pa tawm ntawm qhov kawg ntawm lub qhov cub hluav taws xob yuav tsum raug txo, thiab cov roj pulverized tau nce ntxiv rau kev quab yuam tua hluav taws, uas yuav ua rau cov cua sov ntawm qhov kub hnyiab tau sai thiab ua rau muaj kev puas tsuaj loj rau cov kiln refractory cib.
Thaum muaj cov khoom siv tsawg dhau los hauv lub kiln, cov nplaim hluav taws xob pulverized yuav qaij qis, thiab cov kiln crust nyob rau hauv cheeb tsam no yuav poob thiab ua thinner nyob rau hauv high kub. Yog tias cov huab cua ntim thiab cov thee noj tsis tau hloov kho raws sijhawm, cov kiln crust thiab refractory bricks tau yooj yim hlawv.
Lub tuam txhab thaj chaw tsim khoom npog thaj tsam ntawm 40000 square metres thiab muaj yim lub rooj cob qhia raws li cov txheej txheem tsim khoom, suav nrog kev sib tsoo rhiav, batch rhiav, molding rhiav, sib koom ua ke rhiav, ziab rhiav, kev hloov kho rhiav, kev cob qhia cov khoom tiav, thiab kev cob qhia tu.
Peb muaj cov cuab yeej loj - xws li cov khoom sib tov, crushers, hydraulic presses, sintering furnaces, txiav tshuab, tsim tshuab, docking tshuab, thiab ntau yam khoom siv kuaj thiab tshuaj xyuas. Cov chaw kho vajtse no muab kev lees paub rau lub tuam txhab automation thiab loj - teev ntau lawm.
Tau ntau xyoo, lub tuam txhab tau cog lus rau kev tshawb fawb thiab kev loj hlob ntawm siab - kub cua sov cov khoom siv technology thiab lwm yam kev lag luam, tsis tu ncua kev txhim kho cov khoom zoo, accumulating nplua nuj kev tsim, muaj zog technical zog, advanced txheej txheem txheej txheem, ua tiav kev ruaj ntseg system, thiab scientific tswj hom, muab siab - cov khoom zoo thiab cov kev pab zoo meej rau domestic thiab txawv teb chaws cov neeg muas zaub.
Cov khoom raug xa tawm mus rau ntau qhov chaw ntawm lub tebchaws thiab xa tawm mus rau ntau tshaj kaum lub tebchaws thiab cheeb tsam xws li Kaus Lim Qab Teb, Nyiv, Thaib, Is Nrias teb, thiab lwm yam, thiab muaj kev ntseeg siab los ntawm cov neeg siv khoom. Tam sim no, lub tuam txhab muaj ntau yam khoom tau dhau ISO9001 thoob ntiaj teb zoo system ntawv pov thawj.
Daim ntawv pov thawj
FAQ
Cim npe nrov: Tuam Tshoj kiln refractory bricks manufacturers, hoobkas
