英文關鍵字
manufacture
metal
stainless
steel
rolling
machines
rolled
industrial
production
profiled
structures
element
long
products
coldrolled
produced
hotrolled
manufacturing
industry
treatment
handling
working
work
cycle
process
metalroll
factory
closeup
seamless
technology
pipes
finished
product
grinding
processes
metalworking
alloy
welded
profile
finish
polishing
glare
reflection
light
when
shooting
defocus
shiny
tube