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防水等级至少认准IPX7(1米水深30分钟)，骑行大量出汗且遇雨常见；仅IPX4级(防溅水)的心率带汗液长期腐蚀电极扣，1-2年内易出现信号丢失

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Unverified防水等级至少认准IPX7（可短时浸水），仅标注防汗（IPX4）的胸带遇大汗量或雨天跑步易信号漂移；下水训练需WR30以上88% similar Unverified防水等级需达IP67及以上才能应对雨天行走和汗液浸泡，IPX4仅防溅水，长期脚汗环境下低防水等级设备半年内易进水失灵88% similar Unverified防水等级至少IPX7才能应对雨天跑和汗水浸透，IPX4仅防溅水，长期出汗环境下电路易腐蚀失灵84% similar

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