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由水利部电力部杭州机械设计研究所设计、郑州水工机械厂制造的水电站用大型起重设备QM500/40坝顶门机,经葛洲坝工程局安装调试后于1994年5月19日作了全线贯通试运行,5月25日正式下放检修闸门并投入使用.QM500/40坝顶门机属大型水电站(百万级)坝顶专用双向运行的门式起重机,是水电站必不可少的专用起重设备。它由额定起重量500t、起升范围120m 的主机及额定起重量40t、起升范围
Design by the Ministry of Water Resources, Hangzhou Institute of Mechanical Design, Zhengzhou Hydraulic Machinery Factory to build large hydropower station with lifting equipment QM500 / 40 dam door machine, after the installation of Gezhouba Engineering Bureau on May 19, 1994 made a full line through Trial run, the official release of the gate and put into use on May 25. QM500 / 40 dam top door machine is a large-scale hydropower station (million) dam dedicated two-way operation gantry crane, hydropower station is indispensable special lifting equipment. It is rated from the rated capacity of 500t, the lifting range of 120m host and rated lifting capacity 40t, lifting range