| 摘要 |
A printed circuit card kit ( 1 ) comprises a frame ( 2 ), an end cover ( 6 ), a rectangular lower cover ( 3 ), a rectangular upper cover ( 4 ), and a pair of side covers ( 5 ). The upper cover and the lower cover comprise respectively a pair of edges defining a number of openings ( 420,320 ). The frame has two side rails ( 22 ) defining a number of recesses ( 230 ). The side covers have a number of projections ( 50 ) respectively aligned with the openings and recesses. Assembling the end cover to an end of the frame, assembling the upper and lower covers to the frame and assembling the pair of side covers to the side rails of the frame. Therefore, the projections pass the openings and to be retained in the recesses.
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