Unverified70% confidenceDecision RuleTime unknown
刷头刷毛硬度可用指甲测试：能轻松压弯回弹为软毛(适合涂层槽)，需明显用力才弯为硬毛(适合磨砂槽和顽固污渍)；不确定槽材质时优先选中软毛更安全
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70%
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Long-term
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