Unverified50% confidenceDecision RuleTime unknown
竖向栏杆净间距必须≤11cm（约成人拳头宽），防止幼儿头部或身体穿越卡住；横向栏杆间距过大反而形成'梯子'易被攀爬，儿童防护应优先选纯竖栏结构
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