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由河南郑州煤炭工业集团新郑煤电公司设计发明的迈步自移式抬棚装置获得国家专利。迈步自移式抬棚装置主要由4根3.2m千斤顶油缸,1根1.2m油缸,2根4mπ型钢及操作阀、安全阀、管路、销轴等组成,通过人员操作手把阀组,控制π型钢梁
By Henan Zhengzhou Coal Industry Group Xinzheng Coal Company design and invention of the step-by-move lifting device won the national patent. Moving self-propelled lifting device mainly consists of four 3.2m jack cylinder, a 1.2m cylinder, two 4mπ-shaped steel and the operation of the valve, safety valve, pipelines, pins and other components through the hands of the operator valve group, control π-type steel beam