機器
apparatus
automatic
blue
blueprints
board
business
caucasian
chart
control
device
drawings
electric
electronics
energy
engineer
equipment
factory
foreman
holding
industry
inspector
lab
looking
male
man
manager
manual
mechanic
panel
person
plan
power
professional
room
safety
science
service
specialist
standing
station
student
system
technical
technology
voltage
white
worker
workwear
young