Mechanical adjustable whistle,申请号GB19370025514-传众专利搜索

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发明名称	Mechanical adjustable whistle
摘要
申请公布号	GB493662(A)	申请公布日期	1938.10.12
申请号	GB19370025514	申请日期	1937.09.20
申请人	THEODOR RUHLMANN	发明人
分类号	G10D7/02	主分类号	G10D7/02
代理机构		代理人
主权项
地址

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