dust concentration的用法和樣例：
例句
- The settled dust on the walls of the tunnel should be moistened with sticking agent.Only in this way,could the dust concentration in the whole tunnel be effectively controlled.
對巷道周壁的粉塵采用噴灑粘塵劑固塵，才能有效地降低整個(gè)巷道的粉塵濃度。 - Noise and wooddust concentration in the air at the different workplaces in two departments for furniture and chipboard production have been measured.
測定了家具和刨花板生產(chǎn)車(chē)間多種作業(yè)位置的噪聲以及空氣中木粉塵濃度。
