| 摘要 |
PURPOSE:To always bring different material faces into contact with each other even if the directions of front and rear, left and right, top and bottom of each block are not considered, and effectively prevent adhesion of the faces brought into contact with each other in case where the same shaped and the same dimensional rectangular parallelopiped blocks are closely and arranged without any clearance and three-dimensionally overlapped. CONSTITUTION:Two kinds of different material face ranges are provided on each surface of a rectangular parallelopiped block by a figure having symmetry and complementation which is rotation ally symmetric every 90 deg.C around the center of a square or every 180 deg.C around the center of a rectangle and mutually compensatively axisymmetric for a center line which passes through the center and is in parallel with the side. In addition, a specified congruity is allowed to exist in the figure of each face in accordance with various shapes of the rectangular parallelopiped block. If the blocks are arranged and overlapped so that the thickness and length of the blocks may be made uniform, the ranges of the different material faces are always brought into contact with each other on the contact faces of neighbored blocks. |
