摘要 |
<p>The system (M) has stones (60, 66) e.g. dual stones, forming a part of a vertical wall (23) in different orientations. One of the stones is twisted relative to the other stone around 180 degrees around a vertical axis (28) in the orientations. A cover surface of a recess is supported by a support bar (61). A footprint of the bar lies in a level defined by a lower side of one of the stones. One of the stones with the bar is deeply immersed in a slot (64) of an elevation (8) of the other stone so that the lower side of one of the stones lies on an upper side of the other stone.</p> |