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工程机械是国民经济各部门都需要的通用设备,是机械工业的重要组成部分。其门类繁多,包括挖掘机械、铲土运输机械、工程起重机械、压实机械、桩工机械、钢筋机械、混凝土机械、路面机械、线路工程机械、装修机械、叉车、军工专用工程机械、凿岩机械与气动工具等14类产品。近年来国外还大力开发了地下和水下工程机械。在工程机械中,使用液压技术较多、产量较大的是叉车、装载机、汽车起重机、推土机、挖掘机、平地机等。近年来国外在路
Construction machinery is a common equipment needed by all sectors of the national economy and an important part of the machinery industry. It covers a wide range of industries including mining machinery, shovel transport machinery, engineering hoisting machinery, compaction machinery, piling machinery, steel bar machinery, concrete machinery, road machinery, road construction machinery, renovating machinery, forklift trucks, military special construction machinery, rock drills Mechanical and pneumatic tools and other 14 categories of products. In recent years, foreign countries have also vigorously developed underground and underwater construction machinery. In construction machinery, the use of hydraulic technology more yield large forklift, loaders, truck cranes, bulldozers, excavators, graders and so on. In recent years abroad in the road