结晶二氧化硅 meaning in English

crystalline silica

Workplace air . x - ray determination of the conventional alveolate fraction of crystalline silica . sampling by membrane filter
工作场所空气. x射线测定结晶二氧化硅的常规蜂窝状部分.用薄膜过滤器取样
Workplace air . x - ray determination of the concentration of crystalline silica alveolate deposit . sampling by means of rotary cup device
工作场所空气. x射线测定结晶二氧化硅蜂窝状沉积物的浓度.用转动杯装置取样