Hnav qhov chaw rau chaw txua txiag zeb
Hnav qhov chaw rau mining
Hnav qhov chaw rau cov nroj tsuag cement
Hnav cov khoom siv rov ua dua tshiab
Hnav qhov chaw rau demolition
Hnav cov khoom qab zib crushing
Cov Kev Pabcuam Cov Neeg Siv Khoom
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Peb siv cov ncuav qab zib los txhim kho koj txoj kev nrhiav tau, pabcuam cov kev tshaj tawm lossis cov ntsiab lus, thiab tshuaj xyuas peb lub tsheb. Los ntawm txhaj "Txais txhua yam", koj pom zoo rau peb siv cov ncuav qab zib.
