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发明名称
Vorrichtung zum Anschliessen einer Einpressleitung an einem Verrohrungskopf
摘要
申请公布号
DE1041442(B)
申请公布日期
1958.10.23
申请号
DE1956B042888
申请日期
1956.12.20
申请人
GEORGE AARON BUTLER
发明人
BURNS RAY SPENCER
分类号
E21B33/00;E21B33/04
主分类号
E21B33/00
代理机构
代理人
主权项
地址
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