摘要 |
The shaped bricks for ground laying are in pairs (A,B) in identical and mirror-image prisms, with a rectangular base (A0) and two trapezoid side surfaces (A1,A3). Two trapezoid surfaces (A2,A4) form the upper and lower standing surfaces. The end surfaces (A5) are in a parallelogram shape, at an angle to the base surface which is not equal to 90 deg .
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