Canal perfectionné d'insonorisation,申请号FRD921160-传众专利搜索

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发明名称	Canal perfectionné d'insonorisation
摘要
申请公布号	FR921160(A)	申请公布日期	1947.04.29
申请号	FRD921160	申请日期	1945.10.31
申请人	LES TRAVAUX SOUTERRAINS	发明人	ROSEN ALEXANDRE DE
分类号	G10K11/16	主分类号	G10K11/16
代理机构		代理人
主权项
地址

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