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发明名称
Колонковое долото
摘要
申请公布号
SU86129(A1)
申请公布日期
1950.11.30
申请号
SU19490408115
申请日期
1949.12.03
申请人
VLADISLAVLEV V.S.
发明人
VLADISLAVLEV V.S.
分类号
E21B25/00;E21B21/00;E21B49/02
主分类号
E21B25/00
代理机构
代理人
主权项
地址
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