英文關鍵字
activity
bucket
bulldozer
car
construction
cut
development
dig
digger
dump
earth
equipment
excavate
excavation
excavator
excavators
gravel
heavy
industrial
industry
land
large
machine
machinery
mine
movement
mover
natural
open
outdoors
pit
power
production
quarry
sand
shovel
site
soil
stone
truck
vehicle
work
workers
working