| 摘要 |
In a mobile terminal device, a movable-side case is coupled to a fixed-side case by a coupler such that the movable-side case freely overlaps the fixed-side case. The movable-side case houses electronic components including a display; and includes a box-shaped external case that is made of magnesium alloy, having side walls of a height sufficient for housing the electronic components, and including an opening from which the display is exposed, and a panel that is flat, covers a displaying surface of the display, and is fixed to the opening.
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