Compensating gate ram packer,申请号US19520284831-传众专利搜索

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发明名称	Compensating gate ram packer
摘要
申请公布号	US2760751(A)	申请公布日期	1956.08.28
申请号	US19520284831	申请日期	1952.04.28
申请人	SHAFFER TOOL WORKS	发明人	WILDE ARTHUR E.
分类号	E21B33/06	主分类号	E21B33/06
代理机构		代理人
主权项
地址

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