阴极保护常采用牺牲阳极法和外加电流法。
Normally cathodic protection is acquired by sacrificial anodes or impressed current.
牺牲阳极法阴极保护是国内外正在推广的新技术。
Sacrificing anode to protect cathode is now the new technique being widely applied at home and abroad.
牺牲阳极法阴极保护因其不需电源、管理简单、电流分布均匀，特别是对于形状特殊的构筑物。
The sacrificial anode cathodic protection features no power source, simple management and even current distribution. It is well received especially on special shaped structure.
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