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发明名称
Drill bits
摘要
申请公布号
GB980799(A)
申请公布日期
1965.01.20
申请号
GB19620039006
申请日期
1962.10.15
申请人
DIAMANT BOART
发明人
分类号
B24D7/10;B24D7/14;E21B10/46;E21B10/48;E21B10/60
主分类号
B24D7/10
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代理人
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