英文關鍵字
air
blade
chemical
clean
company
crimped
engraved
engraving
factory
image
industry
iron
laser
letter
machine
machining
making
manufacture
manufacturing
marking
pipe
pipes
plant
plastic
polymer
pressure
printer
process
production
products
recycling
repair
rubber
sewer
sign
spark
system
tank
technology
text
tool
tools
tubes
usage
work
workpiece