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发明名称
Самозатачивающаяся буровая коронка
摘要
申请公布号
SU130414(A1)
申请公布日期
1959.11.30
申请号
SU19480365577
申请日期
1948.11.03
申请人
KOJFMAN M.I.
发明人
KOJFMAN M.I.
分类号
E21B10/02
主分类号
E21B10/02
代理机构
代理人
主权项
地址
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