| 摘要 |
A set of elements for flagging surfaces, e.g. pavements, slopes, walls or for walling, each element of said set has a flat top face and a flat bottom face parallel to each other, said top face and said bottom face are rectangular or polygonal with even-numbered sides, along the peripheries of said top face and said bottom face there are alternately bearing abutting side faces and covering abutting side faces conform to each other characterized by virtual inclined planes (8) defined by the sides of said top face (1, 2, 3, 4) and the corresponding sides of said bottom face (1', 2', 3', 4'), and each of said abutting side faces (5, 6, 7, 5', 6', 7') comprising at least one extended face section (9) and one adjoining recessed face section (9') relating to said virtual inclined planes (8). |
