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发明名称
Vorrichtung zur Querschnittsvergrößerung einer Pilotbohrung
摘要
申请公布号
DE19610238(C2)
申请公布日期
1998.08.20
申请号
DE19961010238
申请日期
1996.03.15
申请人
TRACTO-TECHNIK PAUL SCHMIDT SPEZIALMASCHINEN, 57368 LENNESTADT, DE
发明人
HESSE, ALFONS, DIPL.-ING., 57368 LENNESTADT, DE;PUETTMANN, FRANZ-JOSEF, 57368 LENNESTADT, DE
分类号
E21B7/20;E21B7/28;(IPC1-7):E21B7/20;E21B21/00
主分类号
E21B7/20
代理机构
代理人
主权项
地址
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