英文關鍵字
air
blowing
chloride
complexity
engraving
factory
forms
gas
hand
heat
image
industry
inspection
laser
letter
line
machine
making
manufacture
manufacturing
marking
pipe
pipeline
pipes
plastic
polyethylene
polymer
preform
pressure
printer
process
production
ray
recycling
ring
sign
system
technology
text
tool
tubes
tubing
work
worker
workpiece