英文關鍵字
adult
apartment
board
building
business
caucasian
construction
contractor
control
device
display
electronics
engineer
engineering
equipment
factory
fix
helmet
house
industrial
industry
inspector
job
layout
machine
male
man
manufacturing
office
operator
overhaul
panel
plan
portrait
power
production
professional
project
renovate
room
safety
site
station
system
technical
technician
technology
work
worker
young