abrasive

action

activity

angle

building

busy

camera

circle

close

construction

cut

cuts

cutting

danger

disk

engineering

equipment

fps

grinder

heat

heavy

human

industrial

industry

iron

machine

making

manual

manufacturing

metal

motion

occupation

part

pipe

power

rate

safety

section

sharp

slow

slowly

sparks

speed

steel

structure

technology

the

tool

toward

turns

wheel

work

worker

working

workshop