Ratio demonstrator for planetary gearing,申请号US19470757043-传众专利搜索

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发明名称	Ratio demonstrator for planetary gearing
摘要
申请公布号	US2490783(A)	申请公布日期	1949.12.13
申请号	US19470757043	申请日期	1947.06.25
申请人	CULLEN MARION W	发明人	CULLEN MARION W.
分类号	G09B25/02	主分类号	G09B25/02
代理机构		代理人
主权项
地址

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