Rock drill support,申请号US19430482964-传众专利搜索

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发明名称	Rock drill support
摘要
申请公布号	US2379137(A)	申请公布日期	1945.06.26
申请号	US19430482964	申请日期	1943.04.14
申请人	THE CLEVELAND PNEUMATIC TOOL COMPANY	发明人	FEUCHT ALBERT
分类号	E21B15/04	主分类号	E21B15/04
代理机构		代理人
主权项
地址

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