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发明名称
Oil column heating means and method
摘要
申请公布号
US2530280(A)
申请公布日期
1950.11.14
申请号
US19480007013
申请日期
1948.02.07
申请人
THERMACTOR CORPORATION
发明人
ACKLEY CHARLES S.
分类号
E21B36/04
主分类号
E21B36/04
代理机构
代理人
主权项
地址
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