Qhov txawv ntawm Mining Safety Certification thiab Coal Safety Certification

Daim ntawv pov thawj kev nyab xeeb thee thiab daim ntawv pov thawj kev nyab xeeb mine yog ob qho tib si yuav tsum tau daim ntawv pov thawj daim ntawv pov thawj rau cov khoom siv mining thiab cov khoom., muab los ntawm National Safety Mark Center.

Cov ntawv pov thawj kev nyab xeeb thee tshwj xeeb yog hais txog cov khoom siv thiab cov khoom tsim los siv rau hauv thaj chaw subterranean ntawm cov mines. Hloov pauv, mine kev nyab xeeb daim ntawv pov thawj yog tsim los rau cov khoom siv thiab cov khoom siv hauv cov chaw hauv av ntawm cov mines uas tsis yog thee.