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经营范围
发明名称
DRILLING FLUID
摘要
申请公布号
PL149267(B1)
申请公布日期
1990.01.31
申请号
PL19860262932
申请日期
1986.12.10
申请人
发明人
分类号
C09K;(IPC1-7):C09K7/02
主分类号
C09K
代理机构
代理人
主权项
地址
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