Chapeau métallique pour l'industrie minière,申请号FRD1002184-传众专利搜索

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发明名称	Chapeau métallique pour l'industrie minière
摘要
申请公布号	FR1002184(A)	申请公布日期	1952.03.03
申请号	FRD1002184	申请日期	1946.08.10
申请人		发明人	SCHMIDT ALEXANDER
分类号	E21D17/00;E21D17/01	主分类号	E21D17/00
代理机构		代理人
主权项
地址

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