| 摘要 |
<p>Opposite sides of the box bear closely-spaced parallel grooves into which the printed circuit plates fit directly. Smaller plates can be accommodated by fitting the box with grooved partitions. Pref. all four sides of the box are grooved. The grooves may be formed directly in the box walls, or fitted as inserts, possibly in several pieces. The depth of the box can be reduced when necessary with a foam plastic cushion. The end of box is pref. closed with a PVC cover, which may be sealed in place. The dimensions are pref. chosen to suit the standard sizes of circuit plates.</p> |
