英文關鍵字
chamfer
cuts
cutter
day
decrease
diameter
dirty
dungeon
engineering
facilities
factory
from
gloomy
hard
heavy
industry
internal
knife
large
lathe
machine
management
mens
metal
metallurgical
modern
operation
pipe
plant
production
reducing
robots
shavings
style
twentiethcentury
urban
video
work
working