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经营范围
发明名称
DRILLING MUD CLEANING SYSTEM
摘要
申请公布号
SU1490249(A1)
申请公布日期
1989.06.30
申请号
SU19874316287
申请日期
1987.10.14
申请人
TSYGANKOV VIKTOR V,SU
发明人
TSYGANKOV VIKTOR V,SU
分类号
E21B21/06
主分类号
E21B21/06
代理机构
代理人
主权项
地址
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