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A.10-20s
B.20-30s
C.30-50s
D.60-80s

A.開啟
B.半開
C.關(guān)閉
D.全開

A.3%
B.5%
C.8%
D.10%

A.1-5μm
B.10-50μm
C.100-500μm
D.1-50μm

A.水泵沖洗
B.水塔沖洗
C.強制沖洗
D.表面沖洗

A.1%
B.2%
C.3%
D.4%

A.50/s
B.70/s
C.100/s
D.200/s

A.1.0-2.0m
B.1.5-2.0m
C.0.5-2.5m
D.1.0-3.0m

A.10%
B.20%
C.25%
D.30%

A.有效系數(shù)
B.表面負荷
C.雷諾數(shù)
D.水力半徑