arc

assembly

bridgge

bright

construction

craftsman

dark

electric

electrode

equipment

fabricate

fabrication

factory

fire

flash

gas

hand

heat

helmet

hot

industrial

iron

job

laborer

light

manufacture

mask

men

metal

person

pipe

plate

protection

repair

safety

skilled

smoke

sparks

steel

structural

structure

technical

technology

thailand

tool

trained

wear

weld

welder

welding

work

worker

workplace