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经营范围
发明名称
Агрегат для подогрева нефтяных скважин
摘要
申请公布号
SU68800(A1)
申请公布日期
1946.11.30
申请号
SU19450342642
申请日期
1945.12.29
申请人
VANICHKIN A.A.
发明人
VANICHKIN A.A.
分类号
E21B43/24
主分类号
E21B43/24
代理机构
代理人
主权项
地址
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