Hydraulic expanding and retracting rotating member,申请号US19550525204-传众专利搜索

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发明名称	Hydraulic expanding and retracting rotating member
摘要
申请公布号	US2847188(A)	申请公布日期	1958.08.12
申请号	US19550525204	申请日期	1955.07.29
申请人	WILTSE TRACY R	发明人	WILTSE TRACY R.
分类号	E02F5/20;E21B7/02;E21B17/07	主分类号	E02F5/20
代理机构		代理人
主权项
地址

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