| 摘要 |
The right-angled, parallelepiped blocks (1-3) are articulately reciprocally connected with each other in pairs at two adjacently located cross-going edge lines so that the blocks can be bent in one direction but not in the opposite direction. - Each block is provided with transversal recesses (4) at each of its four corner parts, and connecting components (5) are arranged to connect the recesses articulately at the adjacent corner parts in each pair of blocks. At least specific blocks are provided with central cross-going holes (12), and a second like-shaped support component and connected with it through cross rods with ends which insert in the holed blocks in each support component. |
