Lub thoob siv hlua fais fab, lub thoob rub kab thiab cov khoom siv hnav rau cov thoob siv hlua.
Ntug pem hauv ntej ntawm lub thoob fais fab, daim di ncauj thoob, lub thoob arches, arch anchor brackets nrog rau trunnion brackets ntawm lub tshuab fais fab thiab dragline.
Lub sijhawm tshaj tawm: Kaum Ib Hlis-25-2025