英文關鍵字
african
afro
building
business
caucasian
checking
communication
computer
construction
control
danger
data
development
distribution
engineer
engineering
equipment
factory
female
foreman
fuel
gasoline
hardhat
helmet
industrial
industry
inspection
inspector
job
machine
machines
male
man
manager
manufactory
manufacturing
mechanic
network
occupation
operator
people
plant
production
professional
radio
remote
safety
tablet
technician
using
woman
work
worker
working
workshop