Improvements relating to coal cutting,申请号GB19450026929-传众专利搜索

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发明名称	Improvements relating to coal cutting
摘要
申请公布号	GB602406(A)	申请公布日期	1948.05.26
申请号	GB19450026929	申请日期	1945.10.15
申请人	THE PYRENE COMPANY LIMITED;WILFRED JAMES CLIFFORD	发明人
分类号	E21C35/22	主分类号	E21C35/22
代理机构		代理人
主权项
地址

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