| 摘要 |
A portable terminal device includes a printed wiring board having two main sides, a first interface for a first information data exchanging card disposed on one of the two main sides of the printed wiring board, and a second interface for a second information data exchanging card disposed on the other side of the two main sides of the printed wiring board. The first and second cards can be installed on both sides of the printed wiring board in parallel to each other sandwiching the printed wiring board.
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