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an noninvasive ultrasonic focusing technique to directly focus on the mucosal lamia and muscle layer. using ultrasonic waves as the energy source and taking advantage of its penetration and focality. a higher intensity of ultrasonic region, called focus region, is formed, the collagen is reorganized and the normal tissue outside the focal region is undamaged. therefore, the desired depth layer can obtain the ideal effect of collagen concentration, reorganization and regeneration. ultimately, the mysterious effect of vagina tightening is achieved..syi