| 摘要 |
PURPOSE: A block having a projection for forming a joint is provided to easily coincide blocks appropriately aligned. CONSTITUTION: A block having a projection for forming a joint comprises a projection for forming a joint in a side to be projected from the same side of a block so that the joint is formed between adjoining blocks. A first projection(4) formed in sides(a,c,e,g) of the block is formed into a shape to be coincided with a second projection formed in other sides(b,d,f,h) of the block. A respective position of the block with respect to the joint is decided by the block because the first and second projections are coincided with the first and second projections of the adjoined block while constructing. |
