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发明名称
APPARATUS FOR UNDERCUTTING CONNECTING ENDS OF DRILLING PIPES
摘要
申请公布号
SU733865(A1)
申请公布日期
1980.05.15
申请号
SU19752110789
申请日期
1975.02.28
申请人
DOBRINSKIJ ALEKSANDR G,SU
发明人
DOBRINSKIJ ALEKSANDR G,SU
分类号
B23B5/14;(IPC1-7):B23B5/14
主分类号
B23B5/14
代理机构
代理人
主权项
地址
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