Shenhai Explosion-Proof
Thee kev ruaj ntseg daim ntawv pov thawj thiab kuv kev ruaj ntseg daim ntawv pov thawj yog ob yam compulsory daim ntawv pov thawj rau cov khoom tsuas thiab khoom, tawm los ntawm lub National Safety Mark Center.
Thee kev ruaj ntseg daim ntawv pov thawj tshwj xeeb qhia pertains li thiab khoom npaj siv nyob rau hauv ib puag ncig subterranean ntawm thee mines. Conversely, Kuv kev ruaj ntseg daim ntawv pov thawj yog tsim los pab rau cov khoom thiab khoom siv nyob rau hauv underground teev cov-thee mines.