英文關鍵字
abstract
background
chemical
chemistry
commodities
drop
extruder
factory
granulate
granules
hands
industrial
industry
manufacturing
masterbatch
material
modern
pellets
petrochemical
plant
plastic
polyethylene
polymer
polypropylene
polystyrene
preform
product
production
raw
recycling
spunbond
technology
thermoplastic
white