A rigid board made of layers of fiberboard or paper bonded to a gypsum plaster core,used instead of plaster or wood panels in construction to form walls. 石膏灰泥板，灰胶纸柏板由石膏灰泥作芯板结合几层纤维板或纸浆板制成的硬板，在建筑中用于代替灰泥或木板来建造墙壁。
The preparation of anhydrite cement from phosphogypsum produced as the waste of phosphoric acid manufacture has been studied. 利用化工副产品磷石膏制硬石膏水泥的方法。
