Surface pipe bracing and centering means,申请号US19470772106-传众专利搜索

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发明名称	Surface pipe bracing and centering means
摘要
申请公布号	US2584022(A)	申请公布日期	1952.01.29
申请号	US19470772106	申请日期	1947.09.04
申请人	JOHNSON ALBIN B	发明人	JOHNSON ALBIN B.
分类号	E21B19/00;E21D1/06	主分类号	E21B19/00
代理机构		代理人
主权项
地址

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