blue

caution

company

computer

construction

cover

cut

cutter

design

detail

efficiency

electric

engine

engineering

equipment

explosion

factory

fire

flames

flat

gas

heat

heavy

industrial

industry

iron

jet

knife

laser

line

machine

material

mechanic

metal

motion

operator

plasma

plate

power

pressure

production

roll

shape

sheet

shiny

steel

surface

technology

tool

working