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针对广州地区建筑工地横街窄巷多,施工场地狭窄的特点,以及解决当前挖土量多,劳动力缺乏的矛盾,要求用机械化代替笨重体力劳动,提高生产率,提出了试制10马力、重量1.5吨左右的小型挖土机,以适应当前的需要,解决生产上薄弱环节。在局党委正确领导下,组成“三结合”攻关小组,经过半年多时间的设计和制造,于七三年初制成WT-500液压小型挖土机
Aiming at the narrow streets and narrow lanes in the Guangzhou construction site, the narrow construction site characteristics, and the solution to the current problems of excessive excavation and lack of labor, it is required to use mechanization instead of bulky physical labor and improve productivity, and propose trial production of 10 horsepower and a weight of 1.5 tons. About small excavators to meet the current needs, to solve the weak links in production. Under the correct leadership of the bureau’s party committee, the “three-in-one” team was formed. After more than six months of design and manufacturing, the WT-500 hydraulic excavator was made in early 1973.