硬石膏

例句：

1. 1. The construction crew used hardgypsum to reinforce the foundation of the new building.
   建筑工人使用硬石膏来加固新建筑物的基础。
2. 2. Hardgypsum is a common material used in plastering and wallboard manufacturing.
   硬石膏是用于抹灰和墙板制造的常见材料。
3. 3. Due to its hardness, hardgypsum is often used as an alternative to marble for flooring and countertops.
   由于其硬度，硬石膏常被用作地板和台面的大理石替代品。