Appareil à calculer le retard du son,申请号FRD827552-传众专利搜索

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发明名称	Appareil à calculer le retard du son
摘要
申请公布号	FR827552(A)	申请公布日期	1938.04.28
申请号	FRD827552	申请日期	1937.09.27
申请人	ELECTROACUSTIC GES. M.B.H.	发明人
分类号	G01S1/72	主分类号	G01S1/72
代理机构		代理人
主权项
地址

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