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发明名称
ROLLER BIT
摘要
申请公布号
SU1615310(A1)
申请公布日期
1990.12.23
申请号
SU19874370106
申请日期
1987.12.30
申请人
DROGOBYCHSKIJ DOLOTNYJ ZAVOD
发明人
YAKIMCHUK ULYAN N,SU;VAVRIN ANTON P,SU;POZDYANKOV VIKTOR I,SU;GUK ROMAN I,SU
分类号
E21B10/16
主分类号
E21B10/16
代理机构
代理人
主权项
地址
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