| 摘要 |
A chassis has positioning plates which are perpendicular to each other formed by cutting and bending a plate material, attachment convex portions which are formed by press work of the plate material, and which are projected out in bending direction of the positioning plates, and L-shaped attachments. Aboard has a pair of slits into which a pair of the positioning plates inserted, and attachment holes. The board is positioned in two directions by a pair of the positioning plates, thereby the board can be positioned with a high degree of accuracy.
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