[KongchangAI]
Unverified85% confidenceFactTime unknown

轴承类型决定顺滑度:滚珠轴承(ball bearing)比普通铜套轴承旋转阻力小、寿命长,适合高频甩绳;廉价跳绳的塑料轴承半年内易卡顿

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85%
Confidence
Long-term
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