熟石膏

yī xiǎo piàn shú shí gāo

一小片熟石膏

a flake of plaster

yǐ shú shí huī shuǐ ní shú liào shú shí gāo wéi zhù jì de chéng lì gōng yì

以熟石灰、水泥熟料、熟石膏为助剂的成粒工艺

the palletizing process with slaked lime, cement clinker and calcined plaster as additive