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发明名称
DEEP-WELL VALVE
摘要
申请公布号
SU1286742(A1)
申请公布日期
1987.01.30
申请号
SU19843777879
申请日期
1984.07.18
申请人
VNI PK I PO OSUSHENIYU MESTOROZHDENIJ POLEZNYKH ISKOPAEMYKH,CüE|ôAóÓHÕM PA¬OTAM,PÔ¯HôÚHOö ×EOóO×ôô ô MAPKÛEö¯EPCKOMÔ ¯EóÔ
发明人
TROYANOV ANATOLIJ M,SU;KVACHEV VASILIJ N,SU
分类号
E21B43/12
主分类号
E21B43/12
代理机构
代理人
主权项
地址
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