Improvements in or relating to apparatus for and method of sinking mine shafts,申请号GB19430010054-传众专利搜索

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发明名称	Improvements in or relating to apparatus for and method of sinking mine shafts
摘要
申请公布号	GB568547(A)	申请公布日期	1945.04.10
申请号	GB19430010054	申请日期	1943.06.22
申请人	JOSEPH MURRAY RIDDELL	发明人
分类号	E21D1/04	主分类号	E21D1/04
代理机构		代理人
主权项
地址

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