| 摘要 |
PROBLEM TO BE SOLVED: To provide a power unit having an enclosure in which a plurality of printed boards having different sizes can be housed in a short time. SOLUTION: This power unit having the enclosure which has an opening and houses the printed boards is provided with a plurality of pairs of upper and lower end guides which respectively guide the upper and lower ends of the printed boards when the printed boards are inserted into the enclosure through the opening. The positions of the lower end guides for a first printed board are made different from those of the lower end guides for a second printed board in the vertical direction of the power unit.
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