英文關鍵字
adult
automate
background
blue
builder
building
bus
business
caucasian
check
civil
clothing
command
computer
construction
content
control
engineer
engineering
equipment
factory
hard
hardhat
hat
heavy
helmet
industrial
industry
job
laptop
machine
machinery
machines
maintenance
male
man
manager
manufacturing
mechanic
metal
occupation
people
plant
produce
production
products
professional
protective
robot
safety
service
steel
technology
tool
wearing
work
worker
workers
workshop