英文關鍵字
arm
backhoe
bucket
builder
building
bulldozer
concrete
construction
crush
debris
demolition
development
diesel
dig
digger
dirt
dredger
earth
earthworks
engineering
equipment
excavate
excavating
excavation
excavator
extraction
garbage
gravel
ground
hydraulic
industrial
industry
loader
machine
machinery
mechanical
mine
mining
mover
pit
sand
scoop
shovel
site
soil
tractor
transport
trench
work