英文關鍵字
action
activity
arm
background
backhoe
bucket
building
bulldozer
construction
crane
debris
dig
digger
disposal
dumper
earthmover
equipment
excavation
excavator
field
gravel
heavy
hydraulic
icon
industrial
industry
ladle
loader
machine
machinery
mechanical
mining
motion
mover
power
quarry
sand
scoop
shovel
sign
site
slow
soil
transport
truck
vehicle
wheel
work