Rotation mechanism,申请号US19340759657-传众专利搜索

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发明名称	Rotation mechanism
摘要
申请公布号	US2055674(A)	申请公布日期	1936.09.29
申请号	US19340759657	申请日期	1934.12.29
申请人	INGERSOLL-RAND COMPANY	发明人	SR. WILLIAM A. SMITH,
分类号	E21B6/06	主分类号	E21B6/06
代理机构		代理人
主权项
地址

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