... 间隙保持器 space retainer 间隙编码 gap coding 间隙补偿齿轮 rocker compensating gear ...
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Funcitional Space Retainer 功能性保持器
Oral health instruction, fissure sealing, fluoridation, caries filling, space retainer, deciduous root canal treatment, functional appliance.
口腔保健教育，窝沟封闭，儿童龋齿预防和治疗，预防性矫治。
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