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经营范围
发明名称
WELLBORE FLUID
摘要
申请公布号
GB8923082(D0)
申请公布日期
1989.11.29
申请号
GB19890023082
申请日期
1989.10.13
申请人
ECC INTERNATIONAL LIMITED
发明人
分类号
C09K8/20
主分类号
C09K8/20
代理机构
代理人
主权项
地址
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