Underground exploitation of fuel deposits,申请号US19460702533-传众专利搜索

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发明名称	Underground exploitation of fuel deposits
摘要
申请公布号	US2497868(A)	申请公布日期	1950.02.21
申请号	US19460702533	申请日期	1946.10.10
申请人	DAVID DALIN	发明人	DALIN DAVID
分类号	E21B43/243	主分类号	E21B43/243
代理机构		代理人
主权项
地址

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