| 摘要 |
A bulb mounting portion is formed in each of bulb mounting sockets. Engaging protuberances are formed on a lower end portion of the bulb mounting portion so as to confront each other. On the other hand, a plurality of holding ribs for holding electrical wires and a plurality of pairs of pressure ribs are arranged on a board. A pair of engaging catches are arranged for each bulb mounting socket. For fixing each bulb mounting socket on the board, the engaging catches resiliently engage with the corresponding engaging protuberances.
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