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英文關鍵字
activity
yellow
white
view
small
mine
equipment
human
orange
transport
vehicle
transportation
little
mountain
industrial
power
machine
gray
big
heavy
construction
industry
work
earth
rock
truck
wheel
iron
stones
granite
tractor
machinery
limestone
marble
excavation
excavator
hydraulic
loader
pit
mining
aggregate
loads
ratio
overall
ore
careers
quarrying
Earth Mover