英语语法分析

What soundboard thickness does he work to?

他的面板要做到怎样的厚度呢？

Cracked soundboard or back - This is a clear sign that the guitar has been dried out.

声板或背板裂纹——这是吉他干燥最显而易见的特征。

Most piano builders make few adjustments to the most crucial part of the instrument the soundboard.

大多数钢琴制造者对钢琴最要害的部分—共鸣板几乎不做调整。