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经营范围
发明名称
Drills
摘要
申请公布号
GB2075409(A)
申请公布日期
1981.11.18
申请号
GB19800015357
申请日期
1980.05.09
申请人
VSESOJUZNY NAUCHNO ISSLEDOVATELSKY INSTITUT TUGOPLAVKIKH;VSESOJUZNY NAUCHNO ISSLEDOVATELSKY I PROEKTNO KONSTRUKTO
发明人
分类号
E21B10/44;(IPC1-7):B25D17/02
主分类号
E21B10/44
代理机构
代理人
主权项
地址
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