機(jī)電詞匯 - O

Occupied 占阻
    Open System 開放式系統(tǒng)
    Open Type Track Circuit 開放式軌道電路
    Outside of Signal 號志機(jī)外方
    Over-Ride 擱置
    Overhead Travelling Crane 天車
    Overlap 重迭
    Overlap Locking 重迭鎖定
    Overrun 越限行駛
    Overspeed Protection 超速保護(hù)