英文關鍵字
aluminium
automation
blue
building
business
caucasian
closeup
engineering
equipment
factory
fire
fluid
indoor
industrial
industry
interior
job
join
labor
laborer
machine
machinery
man
manufacturing
mechanic
mechanical
mechanism
metal
miller
overall
person
plant
production
profession
repair
retro
room
safety
shipyard
skill
steel
technical
technician
technology
tool
welder
work
worker
workshop