英文關鍵字
activity
angle
build
building
bulldozer
business
caterpillar
city
clear
concepts
construction
development
digger
digging
dirt
dredge
dredger
earth
equipment
excavation
excavator
grab
growth
heap
heavy
hydraulic
industrial
industry
large
machine
machinery
metal
mover
navvy
object
people
picking
platform
power
preparation
quarry
realtor
rubble
sand
scoop
shovel
site
sky
track
view
worker
working