英文關鍵字
business
camera
closeup
detail
drill
engineering
equipment
factory
gear
grease
heavy
industrial
industry
iron
lathe
liquid
look
lubricant
machine
machinery
manufacture
mechanical
metal
metallic
mill
motion
new
oil
old
part
plant
production
rusty
shiny
shop
slow
steel
stream
technology
tool
well
work
workshop