double-layer wallboard

• 双层墙板

double-layer wallboard的用法和样例：

例句

1. The wallboard comes in both white oak and yellow pine.
   墙板分两类，一种是白栎木，另一种是黄松。
2. Phosphogysum can be used in products for which color is not so important, as in wallboard and cement.
   磷石膏可以用在不怎么讲究色泽的产品中，象墙板和水泥。