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经营范围
发明名称
VENT LINE SYSTEM
摘要
申请公布号
EP0131618(B1)
申请公布日期
1988.07.20
申请号
EP19840900664
申请日期
1984.01.09
申请人
HYDRIL COMPANY
发明人
ROCHE, JOSEPH, R.
分类号
E21B33/06;E21B21/00;E21B21/08;E21B21/10;F16K11/065;F16K11/085;(IPC1-7):E21B21/08;F16K11/06
主分类号
E21B33/06
代理机构
代理人
主权项
地址
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