大型的阀门和重要阀门采用这种阴极保护法，是一种经济简便又行之有效的方法。
Large valves and important cathodic protection method using this valve is an economical and easy and effective way.
介绍了埋地管线的阴极保护原理，阐述了埋地管道的阴极保护方法和牺牲阳极保护法选用及布点的技术要求。
This paper introduces the working principle of cathode protection in underground metallic pipe, expounds the essential of technique and constructed method .
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