Traditional coatings have many defects in the application of pipeline internal corrosion protection and the problem of inner joint wrap has not been solved till now.
传统涂料在管道内防腐的应用上存在着许多缺陷，而且内补口问题始终没得到解决。
Traditional coatings have many defects in the application of pipeline internal corrosion protection and the problem of inner joint wrap has not been solved till now.
传统涂料在管道内防腐的应用上存在着许多缺陷，而且内补口问题始终没得到解决。
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