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经营范围
发明名称
WELLHEAD SEALING DEVICE
摘要
申请公布号
SU1745879(A1)
申请公布日期
1992.07.07
申请号
SU19904850224
申请日期
1990.07.12
申请人
VOSTOCHNYJ NI NEFTEGAZOVYJ I PO TEKHNIKE BEZOPASNOSTI PROMSANITARII
发明人
RASTORGUEV MIKHAIL A,SU;TIMERKHANOV NAIL SH,SU;GAZIZOV ROBERT F,SU
分类号
E21B33/03
主分类号
E21B33/03
代理机构
代理人
主权项
地址
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