Unverified85% confidenceDecision RuleTime unknown
孔位选择原则：常住人数+1个冗余（客用/电动牙刷头），电动牙刷占位大，需确认孔径≥25mm或选择开放式卡槽而非封闭圆孔
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85%
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Long-term
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Unverified孔位选择按人数+1冗余，电动牙刷刷头直径需20-25mm大孔位，普通牙刷孔位放不进电动牙刷，混用家庭需选可调节或大孔径款84% similarUnverified容量孔位按家庭人数×1.5预留：2人家庭选4孔（含备用牙刷/漱口杯位），电动牙刷用户需确认孔径≥25mm否则粗刷柄插不进81% similarUnverified选购前必须实测原有孔距或确认为不限孔距底座：多数L型扶手固定座为3孔或4孔且孔距固定（常见60-70mm），若替换旧扶手孔位不符需重新打孔，破坏防水层72% similarUnverified牙刷插孔间距＜2cm时刷头会互相接触导致交叉污染，选购时确认孔位间距≥2.5cm或采用独立分隔槽，多人共用家庭优先分隔式而非大通孔式70% similarUnverified五孔插座的两孔与三孔间距应≥30mm以避免两个插头互相干涉，选购时确认布局为错位或分区设计，否则实际只能用一个孔68% similar
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