英文關鍵字
area
backhoe
build
building
buildings
bulldozer
busy
cement
city
concrete
construct
construction
contemporary
day
develop
development
dig
digger
dirt
economy
engineering
equipment
estate
excavating
exterior
ground
heavy
industrial
industry
labor
loader
machine
machinery
material
metal
move
mover
people
pit
plan
progress
project
rise
sand
scoop
site
slowmotion
soil
steel
structure
tool
urban
water
work
working
workplace