| 摘要 |
PROBLEM TO BE SOLVED: To make an operator easily able to arrange each board at an appropriate position even if a projection is present on one side of a pair of the edges facing each other when at least the two boards are provided at an adjoining position. SOLUTION: In the one side of the pair of the edges facing each other, a projection 164 projected from the one side to the other side edge is formed, and in the other side, a recess 165 is formed at a position corresponding to the projection 164 of the one side. COPYRIGHT: (C)2004,JPO&NCIPI
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