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经营范围
发明名称
ADDITIVE FOR DRILLING FLUID
摘要
申请公布号
PL124840(B1)
申请公布日期
1983.02.28
申请号
PL19790219214
申请日期
1979.10.24
申请人
发明人
分类号
C10M;(IPC1-7):C09K7/02
主分类号
C10M
代理机构
代理人
主权项
地址
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