red

bright

equipment

metal

liquid

plant

steel

form

man

industrial

power

technology

heavy

flowing

smoke

construction

industry

hot

pour

occupation

work

fire

flame

glow

heat

freight

production

manufacturing

iron

hard

burning

mill

worker

factory

spark

sparks

cast

fumes

furnace

casting

melting

foundry

flows

metallurgy

smelting

smelter

smeltery

hard work

metal worker

steel mill