Improvements relating to pit props and like supports,申请号GB19440003661-传众专利搜索

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发明名称	Improvements relating to pit props and like supports
摘要
申请公布号	GB577755(A)	申请公布日期	1946.05.30
申请号	GB19440003661	申请日期	1944.02.28
申请人	JOHN JAMES BERTRAM WHEATLEY;HALE AND HALE (TIPTON) LIMITED	发明人
分类号	E21D15/12	主分类号	E21D15/12
代理机构		代理人
主权项
地址

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