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发明名称
WELLHEAD SEALING DEVICE
摘要
申请公布号
SU1709066(A1)
申请公布日期
1992.01.30
申请号
SU19904791392
申请日期
1990.02.14
申请人
KURTOV VENIAMIN D,SU;ZYKOV ALEKSANDR V,SU;POPOV VALERIJ A,SU;OSIPOV VASILIJ P,SU
发明人
KURTOV VENIAMIN D,SU;ZYKOV ALEKSANDR V,SU;POPOV VALERIJ A,SU;OSIPOV VASILIJ P,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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