英文關鍵字
quarry
stone
sorting
conveyor
mining
crushing
line
vehicle
equipment
action
mover
occupation
plant
process
sand
sandpit
scoop
mobile
screening
shoveling
soil
unloading
vibrating
feeder
work
shovel
dirtied
bucket
building
bulldozer
construction
conveyer
backhoe
job
excavator
loader
heavy
machine
gravel
excavation
industry
machinery