automatic

belt

clay

coal

construction

conveyor

dirt

distribution

equipment

factory

gravel

heap

heavy

indoors

industrial

industry

large

line

long

machine

machinery

manufacture

manufacturing

material

metal

mine

mineral

motion

moving

order

plant

power

production

quarry

rock

roller

row

rubber

sand

stone

storage

strip

supply

technology

transport

transportation

warehouse

work