英文關鍵字
automation
building
business
caucasian
closeup
cooling
cutting
engineering
equipment
fabricate
factory
fire
fluid
heat
heavy
indoor
industrial
industry
interior
job
labor
liquid
machine
machinery
man
manufacturing
mechanic
mechanical
mechanism
metal
milling
people
person
plant
production
profession
retro
room
rotating
steel
technician
technology
tool
trained
welder
welding
work
worker
workshop