Expanding rotary reamer,申请号US19280254266-传众专利搜索

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发明名称	Expanding rotary reamer
摘要
申请公布号	US1819367(A)	申请公布日期	1931.08.18
申请号	US19280254266	申请日期	1928.02.14
申请人	JOHN GRANT	发明人	GRANT JOHN
分类号	E21B10/34	主分类号	E21B10/34
代理机构		代理人
主权项
地址

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