機器
apparatus
arms
assured
automatic
beard
board
caucasian
concept
confidence
confident
constructor
control
crossed
electric
electronics
engineer
engineering
equipment
factory
helmet
industry
inspector
lab
leadership
male
man
manager
manual
mechanic
panel
portrait
power
professional
room
serious
service
smile
specialist
station
success
system
technical
technician
voltage
work
worker
workplace
workwear
young