Rock drill lubricator,申请号US19320585877-传众专利搜索

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发明名称	Rock drill lubricator
摘要
申请公布号	US1971772(A)	申请公布日期	1934.08.28
申请号	US19320585877	申请日期	1932.01.11
申请人	THE CLEVELAND ROCK DRILL COMPANY	发明人	CURTIS JOHN C.
分类号	B25D17/26	主分类号	B25D17/26
代理机构		代理人
主权项
地址

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