aluminum

angle

background

bar

bars

building

bundle

close

coming

construction

couple

crane

cutting

duct

engineering

equipment

factory

front

girl

grinding

hands

industrial

industry

iron

keyboard

labor

laptop

left

light

liquid

loading

long

machine

manufacturing

metal

moving

pan

pipe

pipes

right

rod

safety

slider

spark

steel

tilt

tool

typing

warehouse

welding

white

worker

working