Method of springing holes in minerals and minerallike materials,申请号US19410386412-传众专利搜索

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发明名称	Method of springing holes in minerals and minerallike materials
摘要
申请公布号	US2286782(A)	申请公布日期	1942.06.16
申请号	US19410386412	申请日期	1941.04.02
申请人	THE LINDE AIR PRODUCTS COMPANY	发明人	AITCHISON ROBERT B.
分类号	E21B7/14;E21B7/28	主分类号	E21B7/14
代理机构		代理人
主权项
地址

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