DRILL STRING BUSHING TOOL,申请号CAD540578-传众专利搜索

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发明名称	DRILL STRING BUSHING TOOL
摘要
申请公布号	CA540578(A)	申请公布日期	1957.05.07
申请号	CAD540578	申请日期
申请人	THE GUIBERSON CORPORATION	发明人	JOHN J. LANE
分类号		主分类号
代理机构		代理人
主权项
地址

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