A.1~2m3∕dB.2~3m3∕dC.3~4m3∕dD.4~4.5m3∕d
A.3~4m3∕dB.4~5m3∕dC.5~6m3∕dD.6~7m3∕d
A.10%~20%B.20%~30%C.30%~35%D.35%~40%