[KongchangAI]
Unverified85% confidenceDecision RuleTime unknown

重量阈值:公路头盔单个重量250g以下为轻量级,300g以上长途骑行颈部易疲劳;山地/全盔因防护面积大普遍350-450g属正常

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85%
Confidence
Long-term
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https://kongchang.com/claim/136058
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curl https://kongchang.com/api/v1/knowledge/claims/136058
MCP
get_claim(id=136058)