IMPACT DRILLING MACHINE,申请号PL19790217276-传众专利搜索

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发明名称	IMPACT DRILLING MACHINE
摘要
申请公布号	PL120121(B1)	申请公布日期	1982.02.27
申请号	PL19790217276	申请日期	1979.07.20
申请人		发明人
分类号	E21C37/22;B25D9/10;B25D11/00;B25D11/12;E21B1/30;E21B1/34;E21B1/38;(IPC1-7):E21C3/24	主分类号	E21C37/22
代理机构		代理人
主权项
地址

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