| 摘要 |
PROBLEM TO BE SOLVED: To define a borderline between a road and a sidewalk, and to protect a curb in the case of snow removal and prevent wheel slipping-off into a U-shaped ditch of a passing car. SOLUTION: The borderline between the road and the sidewalk can be defined by directly installing mark poles for snow removal to a curb-L garter and the U-shaped ditch. |
