Unverified85% confidenceTradeoffTime unknown
吸水能力与去污磨砂能力互相矛盾：海绵吸水多但磨砂弱，钢丝/金属网去污强但几乎不吸水，双层复合款（海绵+磨砂布）是折中选择
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85%
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Long-term
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