[KongchangAI]
Unverified90% confidenceDecision RuleTime unknown

护背护板认证看EN 1621-2标准:Level 1允许平均残余力≤18kN,Level 2要求≤9kN(单点峰值≤12kN),高速公路及赛道骑行应选Level 2脊椎护板

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