luv nqi tawg Tawm Tsav Tsheb
Tiv thaiv cov ntaub ntawv pov thawj yog ib hom kev siv lub tshuab uas siv tau rau cov chaw uas muaj kub thiab tawg. Nws tsis tsim hluav taws xob thaum khiav. Tov txhuam cov ntaub ntawv pov thawj yog siv hauv cov mine, roj av, roj, kev lag luam thiab kev lag luam chemicals. Tsis tas li ntawd, nws tau raug siv dav hauv cov khoom siv roj hmab, lub tshuab ua hlau, cov pa roj carbon tsheb, kev thauj mus los, kev lis nplej thiab kev ua roj, ua ntawv, tshuaj thiab lwm yam. Raws li cov khoom siv hluav taws xob tseem ceeb, kev tawg tshuab hluav taws xob feem ntau yog siv tsav tsheb, kiv cua, compressors thiab lwm yam khoom siv kis tau
