英文關鍵字
chemical
chemistry
conveyor
creation
development
dye
ecology
element
energy
extrusion
factory
grain
grained
granulate
granules
grey
hands
industrial
industry
isolated
lab
laboratory
line
machine
pattern
petrochemical
pigment
plastic
polymer
polypropylene
process
product
recycling
regranulate
science
scientific
select
slow
substance
synthesis
technology
texture
thermoplastic
tint
tinted
transveyer