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经营范围
发明名称
KOPPELING VOOR METALEN BUIZEN.
摘要
申请公布号
NL154313(B)
申请公布日期
1977.08.15
申请号
NL19660015311
申请日期
1966.10.28
申请人
VALLOUREC, SOCIETE ANONYME, PARIJS.
发明人
分类号
E21B17/042;F16L15/04;F16L15/06;(IPC1-7):F16L15/04;E21B17/04
主分类号
E21B17/042
代理机构
代理人
主权项
地址
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