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经营范围
发明名称
Electrical grounding system
摘要
An electrical ground system as a metal conductor surrounded by a composition comprising a mixture of portland cement, sized calcined fluid petroleum coke, micro-carbon rods and carbon black.
申请公布号
US4994629(A)
申请公布日期
1991.02.19
申请号
US19900550637
申请日期
1990.07.10
申请人
CATHODIC ENGINEERING EQUIPMENT CO., INC.
发明人
TATUM, JR., JOSEPH F.;LEWIS, JR., THOMAS H.
分类号
H01R4/66;H02G9/02
主分类号
H01R4/66
代理机构
代理人
主权项
地址
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