airborne dust造句

concentration of airborne dust

measurement of airborne dust by the membrane filter method

Filtered ventilation fans prevent airborne dust particles from being drawn into the chassis.

That means 4, 594 fewer tons of airborne dust each year until at least 2009.

We make the study and application of airborne dust control technology on urban bare land, and shall construct the zone of application and demonstration of sand protection and control technology etc.