Improvements in and relating to supports for the roofs of mine galleries and for similar purposes,申请号GB19330012328-传众专利搜索

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发明名称	Improvements in and relating to supports for the roofs of mine galleries and for similar purposes
摘要
申请公布号	GB418313(A)	申请公布日期	1934.10.23
申请号	GB19330012328	申请日期	1933.04.27
申请人	SIDNEY BATES	发明人
分类号	E21D15/60	主分类号	E21D15/60
代理机构		代理人
主权项
地址

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