Habe das bei einer der U-Bahnen in NRW gesehen. Es befindet sich unten unter jedem Sitz und hat ein Fenster, durch das man den (Staub-)Messer sehen kann. Weiß jemand, was das ist?

    https://i.redd.it/0q4d5ekqjyxc1.png

    Von No_Resource_9

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    2. It’s sand which is poured between wheels and tracks to improve breaking conditions when the track is slippery (for example in fall).

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