英文關鍵字
arm
bucket
build
builder
building
bulldozer
caterpillar
concrete
construction
cracking
debris
demolition
development
diesel
dig
digger
dirt
ditch
dredger
earth
earthworks
engineering
equipment
excavate
excavation
excavator
extraction
garbage
gravel
ground
hydraulic
industrial
industry
land
loader
machine
machinery
mechanical
mover
mud
sand
scoop
shovel
site
soil
tractor
transport
trench
work