A.0.2?0.3m/sB.0.3?0.4m/sC.0.8?1.2m/sD.0.01?0.30m/sE.0.02?0.03m/s
A.初效過濾器B.中效過濾器C.特高效過濾器D.亞高效過濾器E.高效過濾器