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Design Description: The inspiration comes from life, designed a "whistle ring" when the life ring was found only on behalf of a status symbol, there is no more value, if a dangerous situation (such as an earthquake trapped in the ground). This time could not move can not cry out loud, at this time if I had a whistle ring, gentle breeze outside Wensheng rescue personnel can quickly come to rescue. Problem solved. All people-oriented, to facilitate the lives around us.