| 摘要 |
<p>Incorrect pairing of subsidiary printed circuit boards (100a, 100b) on opposite sides of a main circuit board (10) is prevented by providing a shaped key or insert (150a, 150b) on each subsidiary circuit board (100a, 100b). The inserts (150a, 150b) are arranged to mate within an aperture in the main board (10) only when the inserts are complementary in shape and orientation.</p> |
