英文關鍵字
background
black
blue
business
chemical
chemistry
color
composite
corrugation
environment
equipment
extrusion
factory
glove
grained
granulate
granule
granules
gray
industrial
industry
injection
manufacture
manufacturing
material
mix
mixing
molding
movement
particle
pattern
pellets
petrochemical
pipe
plant
plastic
polycarbonate
polyethylene
polymer
polypropylene
polystyrene
production
raw
recycling
strew
substance
technology
thermoplastic
white
work