abstract

background

bright

burn

closed

concept

danger

design

energy

equipment

extreme

factory

fiery

fire

flame

furnace

fused

glow

heating

hot

idea

incandescent

industry

iron

light

manufacture

manufacturing

material

melt

metal

metallurgical

metallurgy

orange

oven

plant

processes

round

smelting

spreading

steel

texture

window

work

works

yellow