{HEAD ~ A second embodiment} of {TAIL ~ the present invention} is provided for overcoming the above problems of the first embodiment and includes structural components for providing a feature of Spot Wobble Defocus 
of
{ HEAD ~ A second embodiment } of { TAIL ~ the present invention } is provided for overcoming the above problems of the first embodiment and includes structural components for providing a feature of Spot Wobble Defocus
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