Suspension de membrane,申请号FRD1008773-传众专利搜索

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发明名称	Suspension de membrane
摘要
申请公布号	FR1008773(A)	申请公布日期	1952.05.21
申请号	FRD1008773	申请日期	1948.05.24
申请人		发明人	BEERWALD PAUL
分类号	H04R7/20	主分类号	H04R7/20
代理机构		代理人
主权项
地址

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