Ib qho yooj yim thiab siv tau qhov system
Lub zog ruaj khov, ruaj khov, hloov tau yooj yim thiab siv tau zoo, Tuam Tshoj Coal Steel Structure Framework System, tuaj yeem muab cov neeg siv khoom nrog ntau yam kev lag luam thiab kev ua haujlwm. Nws tau ua raws li cov kev cai ntawm ntau lub tsev rau ntau lub hom phiaj.