Unverified80% confidenceTradeoffTime unknown
折叠越极致（体积越小）通常稳定性越差、坐圈越硌，硅胶可折叠坐圈携带方便但支撑感弱，塑料一体坐圈稳但占空间——外出高频选前者，训练期选后者
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80%
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Long-term
Relevance
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