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发明名称
GAS-LIFTING VALVE
摘要
申请公布号
RU1806259(C)
申请公布日期
1993.03.30
申请号
SU19904806049
申请日期
1990.03.26
申请人
VOLGOGRADSKIJ GNI PI NEFTYANOJ PROMYSHLENNOSTI
发明人
SMIRNOV VITALIJ I,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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