为了适应大型矿山发展的需要,辽宁省冶金局、机械局遵照毛主席、周总理的教导和指示,经过一年多的努力,1977年由抚顺挖掘机厂试制出样机。一、用途该机主要用于大型露天矿,采掘经过爆破的矿石、岩石及剥离夹泥土的砾石,亦可用于大型水利建筑工程的土石方工程,它有三种斗 In order to meet the needs of the development of large-scale mines, Liaoning Metallurgical Bureau, Machinery Bureau in accordance with Chairman Mao and Premier Zhou’s guidance and instructions, after more than a year of hard work, in 1977 by the Fushun excavator prototype trial prototype. First, the use of The machine is mainly used for large open-pit mines, mining after blasting ore, rock and peel off gravel soil, can also be used for large-scale water conservancy construction earthwork, it has three kinds of bucket