Stone for making channels has cubic first stone section with its top side forming bed for channel and second stone section, raised at the edge of channel, forming lateral boundary of channel whereby stone has T-shape

摘要

The stone (1) has two stone sections whereby first stone section (2) with its top side (4) forms a bed for channel and has a cubic shape. The second stone section (3), raised at the edge of channel (7), forms a lateral boundary (5) of the channel with its top side (6) attached to the top side of the first stone section. The stone is formed as a T-shape. The lower surface (8) of the first stone section and the second stone sections protrudes to a common level (10). The second stone section protrudes in both sides of the channel compared to the first stone section.