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经营范围
发明名称
CASING STRING FILTER
摘要
申请公布号
RU1828915(C)
申请公布日期
1993.07.23
申请号
SU19894824715
申请日期
1989.06.08
申请人
LIVSHITS LEONID A
发明人
LIVSHITS LEONID A
分类号
E21B43/08
主分类号
E21B43/08
代理机构
代理人
主权项
地址
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