arc

blue

bright

busy

construction

coveralls

craftsmen

electric

engineering

equipment

fabricator

facilities

factory

fire

foundry

gas

glasses

gun

heat

heavy

high

industrial

industry

iron

light

machinist

man

manual

manufacturing

mask

metal

occupation

plate

power

protection

red

safety

sparks

steel

technology

temperature

tools

torch

welder

welders

welding

worker

working

workshop