| 摘要 |
<p>The brick (1) comprises front (2), rear (4) and two transverse (3) walls. The front wall is higher than the others and protrudes sideways at its ends (5) beyond adjacent sections of the transverse walls. The front faces (6) of these end sections of the front wall are complementary to the intermediate ones (8) joining the raised portion (13) of the front wall to the transverse walls. Due to the shape the end sections bear against each other when two or more bricks are assembled together. The front and transverse walls can be convex-curved towards the outside, and in plan view th brick can be of circular or part-circular cross-section. The rear wall can be flat.</p> |
