angle

connect

construction

craftsman

cut

cutoff

dangerous

disk

drop

electric

engineering

equipment

fire

flash

grinder

hand

heating

hot

iron

light

male

man

manual

metal

metalwork

motion

person

pipe

plumber

protection

radiator

ray

repair

safety

sanitary

sheaf

skilled

smoke

sound

spark

sparkle

spatter

staircase

technology

tool

utility

wheel

work

worker

workplace