{HEAD ~ The present invention} relates to an improvement of a braking structure which is applied to {TAIL ~ a combined portion} between the after mentioned kind of turning body and a base so as to provide a predetermined braking force to the turning according to the turning body combined turnably relative to the base 
{ HEAD ~ The present invention } relates to an improvement of a braking structure which is applied to { TAIL ~ a combined portion } between the after mentioned kind of turning body and a base so as to provide a predetermined braking force to the turning according to the turning body combined turnably relative to the base
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