英文關鍵字
addition
chemical
chemistry
clean
conservation
discovery
drop
dump
element
equipment
extrusion
factory
for
garbage
grains
granulate
granule
granules
industrial
industry
items
manufacturing
material
melting
pellets
petrochemical
plastic
plastics
polycarbonate
polyethylene
polymer
polypropylene
polystyrene
pouring
product
production
products
raw
recycling
regeneration
resin
reusable
reuse
scrap
technology
thermoplastic
treatment
used
waste