機器
asian
business
caucasian
checking
concept
confidence
construction
control
employee
engineer
engineering
enjoy
expertise
factory
glasses
heavy
helmet
industrial
industry
job
labor
looking
machinery
machinist
maintenance
male
man
manufacturing
mechanic
metal
modern
occupation
people
person
production
professional
protection
safety
service
skilled
steel
technician
technology
uniform
work
worker
workman
workplace
workshop