英文關鍵字
polymer
masterbatch
plastic
rotate
white
raw
resin
pellets
loop
chemistry
dye
fly
granules
extrusion
polyethylene
container
grain
compound
plant
petrochemicals
pile
industry
material
thermoplastic
technology
polypropylene
polystyrene
background
petrochemical
injection
recycling
pattern
color
chemical
hdpe
pvc
element
production
granulate
molding
pet
industrial
pigment
closeup
animation