Improvements in or relating to rock drills,申请号GB19360013146-传众专利搜索

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发明名称	Improvements in or relating to rock drills
摘要
申请公布号	GB450931(A)	申请公布日期	1936.07.27
申请号	GB19360013146	申请日期	1936.05.09
申请人	INGERSOLL-RAND COMPANY	发明人
分类号	E21B1/30;E21B21/01	主分类号	E21B1/30
代理机构		代理人
主权项
地址

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