adult

automatic

board

building

business

caucasian

construction

contractor

control

device

display

electronics

engineer

engineering

equipment

factory

fix

helmet

home

industrial

industry

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job

machine

male

man

manufacturing

operator

overhaul

panel

people

plan

plant

portrait

power

production

profession

professional

project

reconstruction

renew

room

safety

system

technical

technician

technology

tools

work

worker