Active jaw for a power tong,申请号US19890442542-传众专利搜索

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发明名称	Active jaw for a power tong
摘要
申请公布号	US5044232(A)	申请公布日期	1991.09.03
申请号	US19890442542	申请日期	1989.11.28
申请人	WEATHERFORD U.S., INC.	发明人	SCHULZE-BECKINGHAUSEN, JOERG E.
分类号	E21B19/16	主分类号	E21B19/16
代理机构		代理人
主权项
地址

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