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江苏省机械局和河北省石家庄矿山机械研究所于一九七九年六月十五日至十八日在徐州市召开了YZ25型、Y24型两种手持式凿岩机样机鉴定会。徐州市科委、徐州市机械局等领导机关以及工厂、矿山和科研、设计等30个单位共47名代表出席了会议。代表们听取了徐州风动工具厂、天水风动工具研究所、湖北郧阳风动工具厂联合设计组关于样机的设计、试制和工业性试验情况的汇报;听取了徐州九里山采石厂及徐州利国铁矿关于样机使用情况的介绍;观看了样机实际凿岩操作表演,并认真地进行了讨论。
Machinery Bureau of Jiangsu Province and Shijiazhuang Mining Machinery Research Institute of Hebei Province convened a prototype appraisal meeting of two hand-held rock drill prototypes YZ25 and Y24 in Xuzhou from June 15 to January 18, Xuzhou Municipal Science and Technology Commission, Xuzhou Municipal Bureau of Machinery and other leading bodies as well as factories, mines and scientific research, design, a total of 30 representatives of 47 units attended the meeting. The delegates listened to the report on the design, trial manufacture and industrial test of Xuzhou Pneumatic Tools Factory, Tianshui Pneumatic Tools Research Institute and Hubei Yunyang Pneumatic Tools Factory; Xuzhou iron ore on the use of the prototype presentation; watch the prototype drilling operation performance, and seriously discussed.