Improvements relating to mine roof supports,申请号GB19320000249-传众专利搜索

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发明名称	Improvements relating to mine roof supports
摘要
申请公布号	GB386116(A)	申请公布日期	1933.01.12
申请号	GB19320000249	申请日期	1932.01.05
申请人	EDWARD JAMES KIMMINS	发明人
分类号	E21D15/48;E21D15/52;E21D15/60	主分类号	E21D15/48
代理机构		代理人
主权项
地址

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