英文關鍵字
background
black
bundles
business
chemical
chemistry
circles
circular
cistern
corrugated
die
equipment
factory
glove
grained
granulate
granule
granules
gray
industrial
industry
manufacture
manufacturing
material
mix
mixing
molding
package
pellets
pipe
plastic
polyethylene
polymer
polypropylene
polyvinyl
pressure
production
raw
recycling
red
resource
rubber
shop
strew
substance
technology
thermoplastic
through
tubes
work
workpiece