auto

car

component

construction

device

engineering

equipment

factory

fire

flame

forging

forming

gas

hammer

hammering

heat

heavy

hit

hot

impact

improve

industrial

industry

iron

machinery

manufacturing

mechanic

mechanical

metal

metalwork

modify

occupation

part

plant

production

skill

smash

steel

structure

technician

tool

torch

vehicle

work

worker

working

workman

workshop