With joint protections of coating and cathode, the buried steel pipeline will still be corroded and penetraded on some pipe surfaces.
埋地钢质管道在防腐层、阴极防腐的共同保护下，钢管的某些区域仍会被腐蚀穿孔。
With joint protections of coating and cathode, the buried steel pipeline will still be corroded and penetraded on some pipe surfaces.
埋地钢质管道在防腐层、阴极防腐的共同保护下，钢管的某些区域仍会被腐蚀穿孔。
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