英文關鍵字
backhoe
bucket
building
bulldozer
civil
construction
crawler
detail
development
digger
digging
drain
drainage
earth
engineering
environment
equipment
excavating
excavation
excavator
foundation
ground
heavy
hole
industrial
industry
infrastructure
loader
machine
machinery
mover
plant
safety
sanitation
scoop
septic
sewage
sewer
sewerage
shovel
site
soil
tank
tool
track
trench
underground
vehicle
waste
work