英文關鍵字
activity
backfilling
big
bucket
build
builder
building
bulldozer
construct
construction
contractor
day
develop
digger
dirt
earth
equipment
excavator
ground
hydraulic
industrial
industry
loader
machine
machinery
modern
motion
operator
perm
playground
power
residential
russia
sand
scoop
shovel
site
slowly
soil
summer
sunny
tall
track
tractor
vehicle
windows
work
works
yellow