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