英文關鍵字
adult
business
contractor
employment
engineer
engineering
face
factory
foreman
happy
hardware
helmet
industrial
industry
job
joyful
maintenance
male
man
manager
manufacturing
modern
occupation
people
placement
plant
portrait
production
profession
professional
protective
safety
service
smiling
standing
technician
technology
uniform
work
worker
working
workman
workplace