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经营范围
发明名称
SCHUIM-GRINDVULLING.
摘要
申请公布号
NL8204552(A)
申请公布日期
1983.06.16
申请号
NL19820004552
申请日期
1982.11.23
申请人
CHEVRON RESEARCH COMPANY TE SAN FRANCISCO, CALIFORNIE, VER. ST. V. AM.
发明人
分类号
E21B43/04;(IPC1-7):E21B43/04
主分类号
E21B43/04
代理机构
代理人
主权项
地址
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