What's the best way to descale these pipes?

给这些水管除垢的最好方法是什么？

By the requirement of the wagon wheel descale technics and manufacturing which is needed before detection, a new type automatic synchronizing deruster was developed to realize these functions.

根据铁路货车轮对除锈探伤的工艺和生产要求，研制了新型的同步除锈机。