Tuyau d'aérage de mines et son procédé de fabrication et de pose,申请号FRD63579-传众专利搜索

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发明名称	Tuyau d'aérage de mines et son procédé de fabrication et de pose
摘要
申请公布号	FR63579(E)	申请公布日期	1955.09.29
申请号	FRD63579	申请日期	1952.12.12
申请人		发明人	SCHAUENBURG HANS GEORG
分类号	E21F1/04	主分类号	E21F1/04
代理机构		代理人
主权项
地址

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