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在铁路客车车厢的端部,有标明“危险！勿动！”的手把,这就是“紧急制动阀”。紧急制动阀的作用是迫使行驶中的列车采取紧急制动。铁路行车部门规定,列车行驶中,只有发生下列情况时才能使用紧急制动阀:如
At the end of the railway carriage, there is a “dangerous! Do not move!” Handle, which is the “emergency brake valve.” The function of the emergency brake valve is to force the traveling train to take an emergency brake. The railway driving department stipulates that the emergency braking valve can only be used when the train is running if the following conditions occur: