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QDY bridge foundry crane with hook is mainly used at the place where the molten metal is lifted. The working class of the complete machine is A7, and the thermal-protective coating is added at the bottom of the main girder.The assembling and test of the crane conform to the document No. ZJBT[2007]375 WHICH WAS ISSUED BY General Administration of Quality Supervison, Inspection and Quarantine of China.link:http://www.chinacranemanufacturer.com/steel-mill-crane/steel-mill-gantry-crane/200-ton-steel-mill-foundry-cast-mobile-crane.html