| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent a through-hole from being provided in an artificial block in which a space can be formed in a side part by partially removing a lateral side.SOLUTION: In a rectangular parallelepiped-shaped artificial block, three or more thin deep notches ranging in one width direction are formed almost in parallel on at least one surface. Thus, since the thin notches are merely formed, a feeling of strangeness is not caused even in ordinary use, and a space can be relatively easily formed in a side part by breaking and removing a plate-like part provided between the notches.</p> |
