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发明名称
HALF-ROUND DRILL FOR DEEP DRILLING
摘要
申请公布号
SU1696174(A1)
申请公布日期
1991.12.07
申请号
SU19894725319
申请日期
1989.08.02
申请人
MAGNITOGORSK METALLURG
发明人
KUZNETSOV IVAN I,SU
分类号
B23B51/06
主分类号
B23B51/06
代理机构
代理人
主权项
地址
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