機器
big
coal
construction
curve
development
dump
earth
ecology
environment
equipment
excavator
exploration
freight
gold
heavy
industrial
industry
iron
landscape
large
load
machinery
metal
mine
mineral
nature
open
opencast
ore
production
quarry
resource
rock
shovel
site
sky
stone
storm
tractor
train
transport
transportation
truck
vehicle
wheel
work
yellow