在毛主席无产阶级革命路线指引下,为落实伟大领袖毛主席“开发矿业”的伟大号召,根据1972年全国凿岩机械与风动工具行业会议精神和一机部(75)矿技便字第7号文的要求于1975年4月组成了有徐州风动工具厂、郧阳风动工具厂、天水风动工具研究所参加的手持式凿岩机联合设计组。经过用户调访,搜集了国內外有关手持式凿岩机方面的资料及样机,认真讨论了用户提供的宝贵意见,分析、对比了国內外手持式凿岩机和其他凿岩机的优点,设计了采用“内回转”和“外回转”两种结构形式的手持式凿岩机方案,并于1975年11月13日至17日在徐州市召开了方案审查会议。参加会议的有制造厂、使用部门和研 Guided by Chairman Mao’s proletarian revolutionary line, in order to implement the great call of Chairman Mao’s “development of the mining industry” by the great leader, according to the spirit of the National Conference on Rock Drilling Machinery and Pneumatic Tools Industry in 1972 and Article 7 No. requirements in April 1975 formed a Xuzhou pneumatic tools factory, Yunyang pneumatic tools factory, Tianshui pneumatic tools to participate in the Institute of handheld joint drill design team. After user’s interview, we collected the domestic and international data and prototype about the hand-held rock drill, discussed the valuable advice provided by the user seriously, analyzed and compared the advantages of the hand-held rock drill and other rock-drill at home and abroad, And “Outer Rotation” two structures of hand-held rock drill program, and in November 13, 1975 to 17 in Xuzhou held a program review meeting. There are manufacturing plants to participate in the meeting, the use of departments and research