司闸员，制动手操纵、检查或维修闸的人，通常指协助列车员和检查火车制动器性能的铁路雇员。
One who operates, inspects, or repairs brakes, especially a railroad employee who assists the conductor and checks on the operation of a train's brakes.
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从前由蒸汽操纵的铁路现在电气化了。
Some railroads once run by steam are now electrified.
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