英文關鍵字
break
build
clay
coating
communication
construction
control
cool
crash
culvert
damaged
danger
ditch
drainage
earthwork
ecology
energy
environmental
equipment
facility
fitting
flood
ground
heating
hole
home
incident
infrastructure
leak
main
maintenance
material
metal
mud
network
orange
pipe
pipeline
pollution
protective
repair
road
smoke
steam
stream
trouble
vapour
wastewater
water