There are very similar devices - track lubricators - used for decreasing friction (to prevent wheel wear) when a train goes around a curve: https://www.llalco.

There are very similar devices - track lubricators - used for decreasing friction (to prevent wheel wear) when a train goes around a curve: https://www.llalco.com/en/industrial-sector/track-lubricators https://www.llalco.com/en/industrial-sector/track-lubricator...