Improvements in and relating to support bars for mining and the like,申请号GB19520032130-传众专利搜索

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发明名称	Improvements in and relating to support bars for mining and the like
摘要
申请公布号	GB775754(A)	申请公布日期	1957.05.29
申请号	GB19520032130	申请日期	1952.12.18
申请人	GUTEHOFFNUNGSHUETTE STERKRADE AKTIENGESELLSCHAFT	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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