[KongchangAI]
Unverified90% confidenceDecision RuleTime unknown

声波式电动牙刷(磁悬浮马达)振动频率通常在31000-42000次/分钟,清洁模式温和适合大多数人;旋转式(机械齿轮)单齿清洁力强但刷毛与牙龈接触摩擦大,牙龈萎缩或敏感人群应优先选声波式

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