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发明名称
Umkehrbares pneumatisches Bodenstechwerkzeug und Verfahren zu dessen Betrieb
摘要
申请公布号
DE19539412(C2)
申请公布日期
1999.02.11
申请号
DE1995139412
申请日期
1995.10.11
申请人
EARTH TOOL COMPANY LLC, OCONOMOWOC, WIS., US
发明人
WENTWORTH, STEVEN W., BROOKFIELD, WIS., US
分类号
E21B4/14;(IPC1-7):E21B7/26;B25D9/00
主分类号
E21B4/14
代理机构
代理人
主权项
地址
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