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Duties introduction subway maintenance technical person

Last update date June 1, 2020

 In midnight track, there is person working in secret in vehicle after the last train.
 Maintenance technical people that that supports train service for 24 hours.
 Does rail not have skewness?
 Is device normal?
 Does station building not have problem?
 We whet eyes and ear and sometimes challenge restoration all through the night and follow safe day.
 "Well, it is OK". When expert work is over, there is the first train in fixed position.

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