Unverified85% confidenceDecision RuleTime unknown
浴室瓷砖缝、水龙头顽固水垢需选转速≥300RPM且扭矩较大的电机；低转速静音款(＜200RPM)只适合日常灰尘和轻污渍，遇到硬质污垢会因电机堵转而无力打滑
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