Semafor is an electrical device that indicates to train drivers information about the state of the line ahead and therefore whether he must stop or may proceed
ID: 182204951
编辑图片
以图搜图
- 大图:3204 × 4838 像素·27.13 cm × 40.96 cm·300dpi·JPG
- 中图:662 × 1000 像素·23.35 cm × 35.28 cm·72dpi·JPG
- 小图:331 × 500 像素·11.68 cm × 17.64 cm·72dpi·JPG