The locomotive signal, the train running monitoring recording device, the breakdown of the rear-end device;
Note that the epoxy adhesive curing speed varies depending on temperature. At higher temperatures it dries faster, but has less resistance and firmness. During the winter you might also leave a few minutes in double boiler pots, and try to take certain temperature (never to be more than 30 degrees at all), like too cold, the information becomes more complicated, thus a viscous mix.
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