Unverified50% confidenceCautionTime unknown

超过座椅标注的最大身高/体重上限不应继续使用，尤其反向座椅当孩子头顶超出椅背上沿时必须切换，否则碰撞中头部会甩出保护范围

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Unverified餐椅底部轮距（前后左右四脚间距）应大于座椅面宽度，重心低+底盘外扩才能防止孩子蹬踏或后仰时整椅翻倒；轮距过窄的高脚椅翻倒风险显著上升80% similar Unverified不建议为了省钱买成人办公椅给孩子用：座宽/坐深过大导致腰背悬空，扶手过高耸肩，最低座高仍偏高使脚悬空，反而破坏坐姿80% similar

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