为加速农业机械化进程,提高装卸机械化水平,我国北方有关省市的农机科研单位和农机工厂为30马力以上轮式拖拉机基本都配上了前置式液压装载装置(见封二、三).这些装载装置的主要性能参数、结构型式及液压元件等方面都具有一定的“三化”水平;采用了统一的试验鉴定方法,经过以装载作业为主的500纯工作小时生产考核后,目前已先后通过了部级或省级 In order to speed up the process of agricultural mechanization and improve the mechanization of loading and unloading, the agricultural research institutes and agricultural machinery factories in relevant provinces and cities in the north of our country are all equipped with front-mounted hydraulic loading devices for wheeled tractors above 30 horsepower (see pages 2 and 3) The main performance parameters, structure type and hydraulic components of the loading device all have a certain level of “three levels”. After adopting a uniform test and appraisal method, after passing the production examination of 500 pure working hours mainly based on the loading operation, Has passed the ministerial or provincial level