機器
belt
blue
business
coal
concrete
construction
conveyor
crusher
energy
equipment
excavation
extraction
factory
geology
gold
gravel
ground
heavy
industrial
industry
large
line
long
machinery
material
metal
mine
mineral
minerals
modern
ore
outcrop
pit
plant
power
processing
production
quarry
rock
sand
soil
stone
strip
technology
transport
transportation
vehicle
white
work