Cov khoom siv ntau yam tau siv dav hauv ntau qhov chaw lag luam xws li roj hmab thiab yas, metallurgical mines, cua thiab nuclear fais fab, kev lag luam khoom noj, crane thiab hoist, thiab lwm yam. Lawv tau txais kev nyiam los ntawm cov neeg siv thoob plaws ntiaj teb vim lawv cov kev ua tau zoo tshaj, ntau tus nqi sib tw thiab kev pabcuam.

Cov khoom

Ntaus nkag mus tshawb lossis ESC kom kaw

Tso Koj Cov Lus