英文關鍵字
big
car
carrying
construction
development
dust
editorial
engineer
engineering
equipment
excavation
extraction
geology
granite
gravel
ground
heavy
huge
illustrative
industrial
industry
landscape
large
loading
machine
machinery
mine
mineral
mining
motion
open
opencast
openpit
people
person
pit
power
process
production
quarry
rock
slow
stone
tractor
transport
transportation
tunnel
vehicle
wheel
yellow