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发明名称
Power plant
摘要
申请公布号
US2171994(A)
申请公布日期
1939.09.05
申请号
US19370122541
申请日期
1937.01.27
申请人
JOHN RIISE
发明人
RIISE JOHN
分类号
E21B3/02;E21B15/00
主分类号
E21B3/02
代理机构
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