Poutrelle annulaire ou cintrée pour galeries de mine,申请号FRD1017982-传众专利搜索

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发明名称	Poutrelle annulaire ou cintrée pour galeries de mine
摘要
申请公布号	FR1017982(A)	申请公布日期	1952.12.24
申请号	FRD1017982	申请日期	1948.08.24
申请人	BOCHUMER EISENHU:TTE HEINTZMANN & CO.	发明人
分类号	E21D11/20	主分类号	E21D11/20
代理机构		代理人
主权项
地址

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