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经营范围
发明名称
CIRCULATION VALVE
摘要
申请公布号
RU1787194(C)
申请公布日期
1993.01.07
申请号
SU19884612429
申请日期
1988.12.02
申请人
NIZHNE-VOLZHSKIJ NII GEOLOGII GEOFIZIKI
发明人
GORODETSKIJ VYACHESLAV E,SU
分类号
E21B34/06
主分类号
E21B34/06
代理机构
代理人
主权项
地址
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