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发明名称
ROHRVERBINDUNG FUER EINZURAMMENDE PFAEHLE
摘要
申请公布号
DE3143365(A1)
申请公布日期
1982.06.09
申请号
DE19813143365
申请日期
1981.11.02
申请人
VARCO INTERNATIONAL INC.
发明人
G. AHLSTONE,ARTHUR
分类号
E02D5/52;E21B17/042;E21B17/043;E21B17/08;F16L15/00
主分类号
E02D5/52
代理机构
代理人
主权项
地址
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