沈阳风动工具厂于1984年12月22日至24日在沈阳召开了YSP45型凿岩机基础件攻关鉴定会。会议由辽宁省机械厅主持,有关的生产、使用、科研等34单位的68名代表参加了会议。会议代表听取了沈阳风动工具厂基础件攻关组关于YSP45型凿岩机的活塞、螺旋棒螺旋母与转动螺母四种基础件的攻关总结及用户使用情况的汇报。代表们认为:攻关组对四种基础件作了大量研究和试验工作,选材适当、工艺合理,大大 Shenyang Fengdonggongju plant in December 1984 December 24 to 24 held in Shenyang, YSP45-type rock drill basic research identification mission. The meeting was presided over by Liaoning Provincial Machinery Department, attended by 68 representatives of 34 units related to production, use and research. Conference delegates listened to the summary and user reports of the four basic parts of the pistons, helical screwdrivers and rotating nuts of the YSP45 rock drill on the basis of the research group of the basic components of the Shenyang Fengdong Power Tools Factory. The deputies said: The research group made a great deal of research and experimentation on the four basic parts, with proper material selection, reasonable process, greatly