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经营范围
发明名称
DRILLING MUD VISCOSIFIER
摘要
申请公布号
GB2025487(B)
申请公布日期
1982.08.11
申请号
GB19790023881
申请日期
1979.07.09
申请人
GRACE & CO WR
发明人
分类号
C09K8/04;(IPC1-7):C09K7/02
主分类号
C09K8/04
代理机构
代理人
主权项
地址
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