Crane wired maub los
Cov khoom siv:
Tsawg tau thov rau kev nqa cov khoom siv, kev thauj khoom, tsheb thauj khoom thauj khoom, tsheb thauj khoom, kev xa cov ntaub ntawv, hlau-smelting thiab steel-making, tsheb tsim, papermaking thiab tshuaj lom neeg kev lag luam, steel qauv ua, galvanization, shipbuilding, choj, qhov tsim kho thiab lwm yam twj thiab qhov chaw uas yuav ua haujlwm tau los ntawm cov tshooj xov tooj cua.
