英文關鍵字
air
background
black
building
chemical
chemistry
energy
equipment
factory
forms
glove
grained
granulate
granule
granules
gray
industrial
industry
making
manufacture
manufacturing
material
mix
mixing
paint
pellets
pipe
plastic
plumber
polyethylene
polymer
polypropylene
pour
powder
production
raw
recycling
service
slow
space
strew
substance
technology
texture
thermoplastic
turning
usage
white
wide
workpiece
workshop