英文關鍵字
alloy
aluminium
aluminum
background
bench
bent
business
cabriole
channel
closeup
cold
cooling
engineering
fabrication
factory
faucet
form
industrial
industry
iron
machine
manufactory
manufacturing
material
metal
metallic
metallurgy
metalwork
mill
pipes
plant
product
production
roll
roller
shaft
shape
stainless
steel
strips
system
tape
technology
texture
tool
tubes
valve
warehouse
water
workshop