aerospace

angle

armature

blade

blunt

circular

concrete

craft

craftsmanship

czech

education

electrical

electricity

equipment

factory

familiarity

familiarize

feel

fixing

flame

friction

golden

grinder

grinding

grindstone

handling

hands

industry

injury

instrument

machine

manual

marking

melting

metallurgical

power

professional

protection

republic

sharpen

sharpener

sharpening

snakestone

spark

speed

technology

trainee

turning

utility

vintage

whetstone

worker