英文關鍵字
approaching
arm
backhoe
bucket
built
bulldozer
concept
construct
construction
contractor
day
dig
digger
engineering
equipment
excavation
excavator
guy
hand
hoe
human
hydraulic
industrial
industry
loader
machine
machinery
man
model
objects
outdoors
outside
removing
sand
scoop
shovel
summer
sunny
technology
toy
track
tractor
truck
vehicle
yellow