Unverified88% confidenceDecision RuleTime unknown
18个月幼儿选购时螺丝头部直径应≥3.5cm，避免误吞风险，且螺丝与孔位配合公差要偏松（旋入2-3圈即固定），否则幼儿手指力量不足无法完成拧转
1
Sources
88%
Confidence
Long-term
Relevance
-
First Seen
Sources
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