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发明名称
DRILL BIT
摘要
申请公布号
JPH0610582(A)
申请公布日期
1994.01.18
申请号
JP19930062355
申请日期
1993.03.23
申请人
BOARUTO H BEE F GMBH & CO KG HARUTOMETARUBERUKUTSUOIKUFUABURIKU
发明人
PETERU ROOZENKURANTSU
分类号
E21B7/20;E21B10/32;E21B10/38;E21B10/56;E21B10/62;(IPC1-7):E21B10/32
主分类号
E21B7/20
代理机构
代理人
主权项
地址
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