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 zog, kev lag luam khoom noj khoom haus, crane thiab hoist, thiab lwm yam. Lawv tau nyiam los ntawm cov neeg siv thoob plaws ntiaj teb vim lawv siab superior kev ua tau zoo, ntau tus nqi sib tw thiab kev pabcuam tshaj lij.