英文關鍵字
activity
bucket
building
bulldozer
construction
crusher
dig
digger
digging
dirt
dump
dumper
dust
earth
engineering
equipment
excavate
excavation
excavator
ground
heavy
hydraulic
industrial
industry
land
large
loader
machine
machinery
mine
motion
mover
outdoors
pit
quarry
sand
site
soil
stonepit
technology
tractor
transport
transportation
truck
vehicle
work
yellow