[KongchangAI]
Unverified85% confidenceDecision RuleTime unknown

超声波频率40kHz是首饰清洗的黄金频段,清洗力与安全性平衡最佳;低于28kHz清洗力强但对精细镶嵌件冲击大,高于60kHz则清洗力偏弱只适合轻度污垢

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