英文關鍵字
aluminium
aluminum
automation
blue
building
business
caucasian
cooling
engineering
equipment
factory
fire
fluid
focusing
heat
heavy
indoor
industrial
industry
interior
job
join
labor
laborer
light
machine
machinery
manufacturing
mechanic
mechanical
mechanism
metal
miller
milling
plant
production
profession
retro
room
rotating
spark
steel
technical
technician
technology
tool
work
worker
workshop