機器
asbestos
automobile
background
big
carry
coal
color
construction
curb
development
driving
dump
dumper
excavator
haul
heavy
huge
industrial
industry
iron
landscape
limestone
load
machinery
material
metal
mine
mining
nature
opencast
ore
production
quarry
raw
rock
stock
stone
tires
transport
transportation
truck
vehicle
wheels
white
yellow