英文關鍵字
abstract
background
chemistry
color
colored
coloring
composition
corrugated
detail
dye
element
figures
format
geometry
granulate
granule
granules
group
industrial
industry
line
made
many
material
model
particle
petrochemical
pigment
plastic
polymer
polymers
polypropylene
polystyrene
pvc
pyramid
pyramidshaped
row
shaped