英文關鍵字
activity
background
big
build
builder
building
bulldozer
claw
construction
contractor
dangerous
developer
development
digger
dirt
dirtwork
dozer
earth
earthmover
eathmoving
engineering
equipment
excavate
excavating
excavation
excavator
grader
ground
heap
heavy
industry
iron
machinery
model
move
mover
moving
outdoors
pattern
powerful
road
scraper
shovel
storm
tractor
transport
unloading
vehicle
wooden
workplace