powder-dust sampling meter 粉尘取样仪

dust sampling train 尘埃取样器

dust sampling meter 粉尘采样仪

dust sampling instrument 粉尘采样器

personal dust sampling device 粉尘全体采样器

dust sampling tube 尘粒取样器

mine dust sampling 矿尘采样

flue dust sampling 烟尘采样

respirable dust sampling 呼吸性粉尘采样器