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发明名称
Коронка для бурения котлов
摘要
申请公布号
SU124897(A1)
申请公布日期
1959.11.30
申请号
SU19580613752
申请日期
1958.12.11
申请人
VOLZHSKIJ V.M.
发明人
VOLZHSKIJ V.M.
分类号
E21B7/28;E21B10/32
主分类号
E21B7/28
代理机构
代理人
主权项
地址
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