mechanically operated
我们都没想到真正的黑道导演可能压根就不听音乐。
control gear and signal, level-crossing, mechanically or electromechanically operated
a mechanically operated piano that uses a roll of perforated paper to activate the keys.
Self-sealing quick release coupling with or without mechanically operated valves.
A usually saucer-shaped bell that is struck with a mechanically operated hammer.
electromechanically operated fingers
