英文關鍵字
alloy
aluminum
background
bending
construction
cutout
extrusion
fabricating
fabrication
factory
grey
holding
industrial
industry
iron
ironworks
machine
making
man
manufacturing
material
metal
metalwork
nickel
person
plant
production
sheet
sheets
shiny
stack
stainless
steel
stock
tubing
warehouse
white
work
worker
workshop