In order to ensure the safety of the train, they stepped on the dowty retarder on the railway line.

As one of the many speed control equipment in the marshalling yard, the dowty retarder is unobtrusive. Dowty retarder is arranged on both sides of the track to slow down the vehicles. The retarder is shaped like a "Pleurotus eryngii" and is called an "iron mushroom". Although it is not a complicated equipment with high technological content, these little dowty retarder are essential for shunting operations, because they ensure the last pass for the safety of rolling vehicles.

In the marshalling station with a radius of 3 square kilometers, 10,900 dowty retarder were installed. The daily work of the workers was to inspect and repair the decelerators to ensure that the dowty retarder could be used normally. The method is to step on with a foot, and a top step on it, the resistance is very large, a bit hard, it is normal use, if it is easy to step on, and the oil and gas is obviously insufficient, then there is a problem.

There are 60 strands in the Jixi Marshalling Yard, 10,900 dowty retarder are installed, and the foot check is repeated every day, which is a very big test of physical strength. Two legs in one day are the same as lead-filled, and the shoes are broken in a month. Just two or three pairs.

Today, the workers have a new partner-a fully automatic decelerating roof working condition inspection vehicle, which is equivalent to a "mushroom stepping robot". Dowty retarder detection technology has advanced, and the inspection efficiency of workers has increased several times compared with the past. The fully-automatic dowty retarder working condition inspection vehicle has gradually become the main force, and the foot inspection has become an auxiliary means.