bottom

check

checking

chemical

communication

construction

coveralls

electrician

energy

engineer

equipment

examination

expert

facility

factory

foreman

hands

hardhat

helmet

human

industrial

industry

instruction

job

maintenance

manager

manufacturing

operator

overalls

overman

plant

power

radio

radiowaves

repair

report

speaking

supervisor

talk

talkie

teamwork

technician

technology

walkie

watch

worker

workingday