Back Water

back water {paddle}

back water curve

back water load

back water pump

back-water

back-water of ash field

back-water valve

back-water=backwater

bounce-back water

BWV (back-water valve)

choking back water

Irrigate water back to undergroundartificially

variation reach of back water

Water Back

water back-flow

water-back up area

high-pressure feed-and back-water circulating system

Abnormal water hammer