鉄道各社が趣向を凝らす､電車｢方向幕｣の秘密

https://plentyofquality.net/entry/2022/11/29/%E9%89%84%E9%81%93%E5%90%84%E7%A4%BE%E3%81%8C%E8%B6%A3%E5%90%91%E3%82%92%E5%87%9D%E3%82%89%E3%81%99%EF%BD%A4%E9%9B%BB%E8%BB%8A%EF%BD%A2%E6%96%B9%E5%90%91%E5%B9%95%EF%BD%A3%E3%81%AE%E7%A7%98%E5%AF%86