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郑州工程机械制造厂在天津工程机械研究所协助下,试制了两台7—9米~3液压自行式铲运机。经过500小时初步作业试验,于1974年2月20～24日在郑州进行鉴定。参加会议的有河南省机械工业局、郑州市重工局、一机部矿山工程局、天津工程机械研究所、铁道兵后勤部、总字308部队、陕西省机械施工公司、彭浦机械厂、厦门工程机械厂、济宁机械厂等单位的代表。会议听取了该机在设计、制造、
Zhengzhou Construction Machinery Manufacturing Factory, with the assistance of Tianjin Institute of Construction Machinery, piloted two 7-9m~3 hydraulic self-propelled scrapers. After 500 hours of preliminary operation tests, they were identified in Zhengzhou from February 20 to 24, 1974. Participated in the meeting were the Henan Machinery Industry Bureau, the Zhengzhou Heavy Industry Bureau, the First Division Mining Engineering Bureau, the Tianjin Institute of Construction Machinery, the Railway Logistics Department, the General Command 308 troops, the Shaanxi Provincial Machinery Construction Company, the Pengpu Machinery Factory, and the Xiamen Project. Machinery Factory, Jining Machinery Factory and other representatives. The meeting listened to the design and manufacture of the aircraft.