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发明名称
Фильтр для нефтяных и водяных скважин
摘要
申请公布号
SU79117(A1)
申请公布日期
1948.11.30
申请号
SU19460382592
申请日期
1946.10.12
申请人
MIKHAJLOV M.I.
发明人
MIKHAJLOV M.I.
分类号
E21B43/08;E03B3/20
主分类号
E21B43/08
代理机构
代理人
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