The appearance of desiccant is ball bead, because the surface area of the spherical, to the largest water vapor adsorption.
干燥剂的外形为球状珠粒,因为球形的表面积最大,有利于水蒸气的吸附。
3
Skin contacted by HF, vapor, or aqueous solution rapidly produces an erythematous (reddened) area, often with a white or gray color at the surface caused by coagulation of tissue.