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发明名称
Vorrichtung zum beiderseitigen Abschliessen von Verrohrungsabschnitten in Bohrloechern und Verfahren zum Einbringen der Vorrichtung in die Verrohrung
摘要
申请公布号
DE1007712(B)
申请公布日期
1957.05.09
申请号
DE1954B032824
申请日期
1954.09.30
申请人
BAKER OIL TOOLS, INC.
发明人
BAKER REUBEN CARLTON;CONRAD MARTIN BARCLEY
分类号
E21B33/126;E21B41/00
主分类号
E21B33/126
代理机构
代理人
主权项
地址
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