| 摘要 |
The panel is made in the form of two overlapping layers of material, each with two projecting edges which have their inner surfaces (23, 45) lying in the same plane. The two projecting edges of one layer have trapezoid-section surface tenons (34. 35) and the corresponding surfaces of the other two edges have matching mortises (32, 33), so that adjoining panels can be fitted together by overlapping their edges. In addition, the surfaces with the tenons have inner grooves (7) which can be filled with a sealing mastic. The panels can be made from a composition material, wood, clay, ceramic or plaster.
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