- The outer and inside of bearing assemble maze &sealed ring which has the effect of water resistance and dust resistance.
- We analyse the factors such as dust resistively, the applied electric field and dust water ration which affect the dust cohesive force.
- The motor car disappeared in eddy of dust.
- The forest will act as a defense against desert dust.
- The car raised quite a dust as we drove off.
- A filter traps dust from the air.