QDY hook bridge crane is mainly used to lift molten metal in metallurgy, casting and other places. The working level of the whole machine is A7, and the thermal insulation layer device is installed at the bottom of the main beam. The crane assembly and test are in accordance with the document ZJBT [2007] No. 375 issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China. Other places for lifting molten non-metallic materials and hot solid metals can also be selected by reference.