機器
cellar
connect
contractor
crude
dewatering
dig
digger
dishwater
ditch
drain
drainage
duct
earth
earthwork
effluent
equipment
excavation
flange
float
flow
full
gas
hole
income
industrial
industry
lap
liquid
overflowing
pipe
pipework
pump
replacement
sewage
sewer
sewerage
slop
slops
stream
street
submersible
trench
tube
utilities
valve
valveworker
wastewater
water
work