简述了膨胀干燥机的基本结构，介绍了主体结构的改造及其应用效果。
The main structure and technical characteristics of screw extrusion expansion dryer were described and the improvement and application of the dryer were introduced.
木材在潮湿的时候就会膨胀，而干燥的时候会缩小，这取决于其中含有的氢氧基团，它可以吸收和释放水分。
Timber swells when it is damp and shrinks when it is dry because it contains groups of atoms called hydroxyl groups, which absorb and release water.
胎压升高主要由于胎内气体膨胀，所以，夏季给车胎充干燥氮气是不错的选择。
Mainly because of rising inflation pressure gas inside the womb, so, the summer to tire filling dry nitrogen is right choice.
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