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发明名称
SYLINDRISK GJENGEFORBINDELSE
摘要
申请公布号
NO170901(B)
申请公布日期
1992.09.14
申请号
NO19870001958
申请日期
1987.05.12
申请人
HYDRIL COMPANY
发明人
SCHWIND, BRIAN E.
分类号
E21B;E21B17/042;F16L;F16L15/00;(IPC1-7):F16L15/00
主分类号
E21B
代理机构
代理人
主权项
地址
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