Unverified90% confidenceDecision RuleTime unknown
3岁以下幼儿选择蜡笔类应认准可水洗+短粗握杆设计（直径≥2cm），并通过EN71-3和ASTM D-4236双认证，避免细杆蜡笔断裂后误吞窒息风险
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90%
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Long-term
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