| 摘要 |
PROBLEM TO BE SOLVED: To facilitate an additional installation and a maintenance of a power supply unit by drawing or inserting the unit from or into a front surface (surface of a cover side) of a power supply unit in a sealed power supply unit having the cover. SOLUTION: The power supply unit comprises a sealed housing having the cover, one or more power supply units contained in the housing, a connector for connecting to a connector of the unit, and wirings for connecting the units or the like. The power supply unit further comprises a backboard for wiring provided on the opposite side to the cover of the housing.
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