Kev lag luam ntawv yuav tsum tau txuas nrog cov khoom siv hluav taws xob, tshuab hnyav, cov thoob, pem teb, thiab racks cia, yog li ntawd lawv yuav tsum tau ntev heev. Peb tseem yuav muab cov duab kos rau koj thaum xav tau.
Qhov no yog peb cov khoom ntawm cov neeg siv khoom scaffolding khoom.
Cov khoom lag luam no tsis yog peb lub zog xwb, thiab peb muaj lub zog technical R & D muaj peev xwm rau koj los kho koj cov khoom.
Xav tias dawb ua kev cai nug los ntawm peb cov kws tshaj lij.

