Improvements in change speed gear,申请号GB19390012537-传众专利搜索

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发明名称	Improvements in change speed gear
摘要
申请公布号	GB530310(A)	申请公布日期	1940.12.10
申请号	GB19390012537	申请日期	1939.04.26
申请人	WILLIAM DOUGLAS MARCHANT;EDWARD STUART PRESTWICH	发明人
分类号	F16H63/18	主分类号	F16H63/18
代理机构		代理人
主权项
地址

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