为适应矿山钻机配套和战备施工对中等排气量风冷式空气压缩机的需要,沈阳空气压缩机配件厂高举“鞍钢宪法”伟大红旗,充分发动群众,组成三结合设计小组,从一九七一年八月开始进行4VF-20/8型两级、双缸、双作用、风冷半移动式空气压缩机的设计和试制工作。第一台样机于一九七一年十月份组装完成,经调试运转48小时设计性能试验后,从一九七二年四月廿七日至六月廿日又进行了500小时负荷运转试验。 In order to meet the needs of mine drilling rigs and combat readiness construction for medium-displacement air-cooled air compressors, Shenyang Air Compressor Parts Factory held the great red banner of the Ansteel Constitution and mobilized the masses to form a three-in-one design team. From 1979, One year in August began 4VF-20/8 type two-cylinder, double cylinder, double-acting, air-cooled semi-portable air compressor design and trial work. The first prototype was assembled in October, 1971. After a commissioning test of 48 hours of design performance, another 500 hours of load test was carried out from April 27 to June 20, 1972.