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