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755W-0.25型、775W-0.30型液压挖掘机是由中国农机院和广饶液压机械厂共同设计试制的,该机已于1982年11月在山东通过部级鉴定,投入小批生产。这两种机型分别与铁牛—55和东方红—75拖拉机配套,是一种后悬挂式的液压挖掘机,机具设计先进、结构新颖,是当前国内农用液压挖掘机的先进产品,单位生产率、功率利用率、工作循环时间等性能参数接近国外同类产品的水平。这两种挖掘机(见封面、封二)都配有两种反铲
755W-0.25 type, 775W-0.30 type hydraulic excavator is jointly designed and trial-produced by China Agricultural Machinery Factory and Guangrao Hydraulic Machinery Factory. The aircraft passed the ministerial appraisal in Shandong in November 1982 and is put into small batch production. These two models, respectively, with the Tractor -55 and Dongfanghong -75 tractor supporting, is a rear-hanging hydraulic excavator, machine design advanced, novel structure, is the current domestic agricultural hydraulic excavator advanced products, unit productivity , Power utilization, duty cycle and other performance parameters close to the level of similar foreign products. Both excavators (see cover, cover two) are equipped with two kinds of backhoe