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经营范围
发明名称
Improvements in electric heater for subterranean fluid reservoirs
摘要
申请公布号
GB726091(A)
申请公布日期
1955.03.16
申请号
GB19530005899
申请日期
1953.03.03
申请人
THERMACTOR COMPANY
发明人
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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