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卸及起重運輸工作。本機按使用繁忙程度分為重級中級兩種工作製度。本機可分為橋架大車運行機構、小車、diandongshebeidengduobufengoucheng，quanbujigoujunzaisijishineicaozongbingyoufangyushebei。benjijuyouqizhongliangda，kuaduguigeduo，gongzuopingwen，anquan，shiyongfanweiguangfandengyoudian。yonghukegenjushijiyaoqiuzaiyidingfanweineixuanyongbutongqizhonglianghekuadudeqizhongji。huanyingzixunqiatan
U型雙主梁門式起重機