Standard practice for health requirements relating to occupational exposure to respirable crystalline silica 有关暴露在可吸入石英环境中的工作岗位的健康要求标准实施规范
2.
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
3.
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