you should master-hump dowty retarder

When repairing and maintaining the hump dowty retarder (inspection), strictly implement the station related contact, registration, and protection system, and it is strictly prohibited to repair the dowty retarder at night and in severe weather such as heavy rain and fog (except when snow removal is guaranteed); in case of hump ( Peak tail) When shunting operations are required, the relevant operators must be notified in advance before leaving the road.
On-site protection personnel can be assigned to dowty retarder reducer maintenance personnel, management personnel, etc., on-site protection personnel must be trained at the station before they can take up their posts, and dowty retarder reducer maintenance personnel and protection personnel take a personal safety training test once a year, and then they can take up their posts after passing the training.