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发明名称
Werkzeug und Verfahren zum Bohren eines Bohrloches
摘要
申请公布号
DE69531486(T2)
申请公布日期
2004.06.17
申请号
DE19956031486T
申请日期
1995.11.20
申请人
HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人
AIZAWA, KAZUO;WASHIMI, TAKEO;KUSAKAWA, NOBUHIRO;HARI, MASANORI;SATOH, AKIRA;MURAOKA, TADASHI;AIHARA, TOMIHIRO
分类号
E21B7/00;E21B7/28;E21B11/00;E21D1/03;E21D1/06;E21D3/00;E21D9/00;(IPC1-7):E21B7/28
主分类号
E21B7/00
代理机构
代理人
主权项
地址
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