Cov yam ntxwv tseem ceeb ntawm kev ua haujlwm:
Upin muaj ntau yam PVC conductive raws li saum npoo npog, thiab sib txuas rau calcium sulphate panels, steel cement panels, lossis woodcore panels.Cov khoom siv ceramic npog no muaj ntau yam kev xaiv saum npoo kom haum rau cov qauv tsim niaj hnub no.
Daim ntawv thov:
Tsim cov ntaub ntawv prefect lossis chaw ua haujlwm ib puag ncig los ntawm UPIN txoj kev nkag mus rau hauv pem teb.Dav siv nyob rau hauv cov ntaub ntawv chaw, chaw ua haujlwm, tshav dav hlau, txhab nyiaj, chaw soj nstuam, tsev kho mob, factories thiab lwm yam.