英文關鍵字
alloy
aluminum
automotive
business
chrome
circle
couples
engineering
equipment
fabrication
factory
hazard
industrial
industry
iron
machine
machinery
manufacture
manufacturing
material
metal
metallic
metalroll
metalwork
metalworking
mill
nickel
part
pipe
pipeline
pipes
process
processing
product
production
rework
roll
sheet
silver
stainless
steel
swaging
technology
tool
tube
warehouse
working
workshop
zinc