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发明名称
ROTARY BIT FOR ROTARY-PERCUSSIVE DRILLING
摘要
申请公布号
SU829846(A1)
申请公布日期
1981.05.15
申请号
SU19792768851
申请日期
1979.05.18
申请人
OTDEL EX ISSLEDOVANIJ TSNI GEOLOGORAZVEDOCHNOGO I TSVETNYKH BLAGORODNYKH METALLOV
发明人
SELIVANOV ANATOLIJ N,SU;RYABININ ALEKSANDR I,SU;SNIZHKO ZOYA A,SU
分类号
(IPC1-7):E21B9/08
主分类号
(IPC1-7):E21B9/08
代理机构
代理人
主权项
地址
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