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发明名称
Seal arrangement
摘要
申请公布号
GB2285822(B)
申请公布日期
1997.07.30
申请号
GB19950000979
申请日期
1995.01.19
申请人
KLAAS JOHANNES * ZWART
发明人
KLAAS JOHANNES * ZWART
分类号
E21B17/06;E21B23/02;E21B33/12;F16J15/08;(IPC1-7):E21B33/04
主分类号
E21B17/06
代理机构
代理人
主权项
地址
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