Unverified85% confidenceTradeoffTime unknown
纳米海绵(三聚氰胺泡棉)本质是消耗品,越擦越小,密度越低耗损越快;密度<5kg/m³的低价款擦几次就掉渣变薄,选高密度款单价高但耐用次数可达低密度的2-3倍
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