| 摘要 |
A user changes the shapes of the side frames from the shapes at the positions indicated by dashed lines at which no external force is applied to those at the positions indicated by dashed lines, and mounts the side frames on the head. As a result, the side frames and rear mount pads perfectly fit on the head, as indicated by solid lines. The user therefore can see video on a main body of a display unit in a natural state without any strain.
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