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 {HEAD ~ the operating unit} is closely attached to {TAIL ~ the back surface} of 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 { HEAD ~ the operating unit } is closely attached to { TAIL ~ the back surface } of the mobile phone
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