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