| 摘要 |
A building stone for masonry work comprises lateral joining surfaces (3, 4) and an upper and lower bearing surface (1, 2), whereby at least one notch (5), which is situated at a distance from the horizontal boundary edges of the upper and lower bearing surfaces (1, 2) and extends over only part of the height (h) of the building stone, is cut into each of the lateral joining surfaces (3, 4). |
