Residents of two capitals:

Board stone is a stone that is laid for the separation of territories (e.g. road and sidewalk, or sidewalk and lawn). There are two types of board stone:
and border. The stone, placed in a level with the surrounding territory and not creating irregularities (most often on the border of the sidewalk and lawn), performs a decorative function.
by Porebrik. The stone, respectively, creates an irregularity (the boundary of the road and the sidewalk).

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