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发明名称
PISTON
摘要
申请公布号
GB8407203(D0)
申请公布日期
1984.04.26
申请号
GB19840007203
申请日期
1984.03.20
申请人
SOC NATIONALE ELF AQUITAINE (PRODUCTION)
发明人
分类号
E21B49/08;F16J15/48;(IPC1-7):F16J9/10
主分类号
E21B49/08
代理机构
代理人
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