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发明名称
Gesteinsbohrer, vorzugsweise mit Hartmetallschneiden
摘要
申请公布号
DE905126(C)
申请公布日期
1954.02.25
申请号
DED905126
申请日期
1949.05.14
申请人
EMIL RICHTER
发明人
RICHTER EMIL
分类号
E21B10/02;E21B10/38;E21B10/62
主分类号
E21B10/02
代理机构
代理人
主权项
地址
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