Support de toit dans une mine souterraine,申请号FRD1084556-传众专利搜索

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发明名称	Support de toit dans une mine souterraine
摘要
申请公布号	FR1084556(A)	申请公布日期	1955.01.20
申请号	FRD1084556	申请日期	1953.10.02
申请人	COAL INDUSTRY (PATENTS) LIMITED	发明人
分类号	E21D17/086	主分类号	E21D17/086
代理机构		代理人
主权项
地址

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