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體積小,重量輕,調(diào)速靈敏,噪音低,效率高等優(yōu)點(diǎn),廣泛用于自動化控制系統(tǒng)中作為副機(jī)
執(zhí)行原件,也可作輕機(jī)械主機(jī)的驅(qū)動源。