Improvements in the boring of holes in geological strata and machines therefor,申请号GB19500008233-传众专利搜索

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发明名称	Improvements in the boring of holes in geological strata and machines therefor
摘要
申请公布号	GB672403(A)	申请公布日期	1952.05.21
申请号	GB19500008233	申请日期	1950.04.03
申请人	UNION CARBIDE AND CARBON CORPORATION	发明人
分类号	E21D9/11	主分类号	E21D9/11
代理机构		代理人
主权项
地址

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