Side wall core taking apparatus,申请号US19400345628-传众专利搜索

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发明名称	Side wall core taking apparatus
摘要
申请公布号	US2268514(A)	申请公布日期	1941.12.30
申请号	US19400345628	申请日期	1940.07.15
申请人	NELL WEST	发明人	OBERWETTER GEORGE T.
分类号	E21B49/06	主分类号	E21B49/06
代理机构		代理人
主权项
地址

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