A vacuum dryer is typically used for separating a volatile liquid by vaporization from a powder, cake, slurry, or other moist material.
一个真空干燥通常用于分离其他潮湿的材料一挥发性液体的蒸发从粉，蛋糕，浆，或。
2
S2, coating one or a plurality of metallic layers on the back of the silicon slice subjected to the surface treatment by vaporization on the vacuum condition;