When the operating unit is at a stored position, the second shafts of the operating unit is moved from the front side of a mobile phone to the back side thereof, so that the operating unit is closely attached to {HEAD ~ the back surface} of {TAIL ~ the mobile phone} 
When the operating unit is at a stored position , the second shafts of the operating unit is moved from the front side of a mobile phone to the back side thereof , so that the operating unit is closely attached to { HEAD ~ the back surface } of { TAIL ~ the mobile phone }
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