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发明名称
VORRICHTUNG ZUM EINBRINGEN EINES BOHRLOCHES IN DAS ERDREICH FUER EIN FUNDIERUNGSELEMENT UND VERFAHREN ZUM BETRIEB DER VORRICHTUNG
摘要
申请公布号
DE1944686(B2)
申请公布日期
1978.02.16
申请号
DE19691944686
申请日期
1969.09.03
申请人
发明人
分类号
E21B21/10;E21B21/12;E21B25/00;E21B41/00;(IPC1-7):E02D17/14
主分类号
E21B21/10
代理机构
代理人
主权项
地址
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