blue

bright

equipment

energy

danger

steel

technology

dark

machine

industry

occupation

work

tool

burn

part

protective

busy

science

safety

manufacturing

manual

iron

torch

Arc

train

engineering

robot

Eyewear

skill

valve

manufacture

factory

automated

spark

automatic

structures

machinery

tank

semiautomatic

welding

welder

metalwork

weld

slag

fabricator

carriages

electrodes

locomotives