英文關鍵字
auto
automatic
automation
chain
chainsaw
circle
concept
cut
during
electric
energy
engineering
equipment
exhibition
factory
grinder
grinding
grindstone
industrial
industry
line
machine
manufacturing
metal
metalwork
metalworking
plant
process
production
red
robot
saw
sharp
sharpen
sharpening
sharpness
spark
super
technology
tool
twinkle
work
workshop