Xps foamed board , has a perfect closed - pore alveolate structure Xps擠出聚苯乙烯發(fā)泡板材,具有完美的閉孔蜂窩狀結構。
Workplace air . x - ray determination of the conventional alveolate fraction of crystalline silica . sampling by membrane filter 工作場所空氣. x射線測定結晶二氧化硅的常規(guī)蜂窩狀部分.用薄膜過濾器取樣
Workplace air . x - ray determination of the concentration of crystalline silica alveolate deposit . sampling by means of rotary cup device 工作場所空氣. x射線測定結晶二氧化硅蜂窩狀沉積物的濃度.用轉動杯裝置取樣