| 摘要 |
On the board, three adjacent contacts form a group. Outer contacts (1B) are interconnected and symmetrical about the inner contact (1A). They (1B) are connected to the anode of the light, the inner (1A) to the cathode, or vice versa. The connector (2) has only a central and an outer contact (2A, 2B) which are adjacent. They provide the supply voltage and a reference potential respectively, or vice versa.
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