Mounting for rock drills,申请号US19280311393-传众专利搜索

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发明名称	Mounting for rock drills
摘要
申请公布号	US1823446(A)	申请公布日期	1931.09.15
申请号	US19280311393	申请日期	1928.10.09
申请人	INGERSOLL-RAND COMPANY	发明人	HANSEN CHARLES C.
分类号	E21B7/02;E21B19/084	主分类号	E21B7/02
代理机构		代理人
主权项
地址

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