一机部矿山工程机械局于1975年12月11～20日在甘肃省天水县召开了凿岩机活塞攻关风动工具行业技术改造经验交流会。会议以阶级斗争为纲,认真贯彻毛主席关于学习无产阶级专政理论等一系列重要指示,传达并学习了全国农业学大寨会议的有关文件和中央首长的 A Machinery Department Mining Engineering Machinery Bureau in December 1975 from 11 to 20 days held in Tianshui, Gansu Province, drilling machine pistons tackling wind power tools industry technology transformation experience exchange. The conference took class struggle as the key link, conscientiously implemented Chairman Mao’s series of important instructions on studying the theory of the proletariat’s dictatorship, conveyed and studied relevant documents from the Dazhai Conference on Agriculture and the Central Executive