英文關鍵字
building
catchpit
catchment
concrete
construction
culvert
current
dale
ditch
downspout
drain
drainage
drainpipe
excess
flood
flow
gutter
highway
hydraulics
hydrodynamics
hydrology
leader
melt
outfall
overflow
pipe
pipeline
rainpipe
road
spout
spring
trumpet
tube
tubing
under
water
waterspout
weeper
work