Improvements in apparatus for removing material from shafts sunk into the ground,申请号GB19570005253-传众专利搜索

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发明名称	Improvements in apparatus for removing material from shafts sunk into the ground
摘要
申请公布号	GB830231(A)	申请公布日期	1960.03.09
申请号	GB19570005253	申请日期	1957.02.15
申请人	THE CEMENTATION COMPANY LIMITED	发明人	KNIGHTON GRAHAM
分类号	E21D1/03	主分类号	E21D1/03
代理机构		代理人
主权项
地址

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