Unverified82% confidenceDecision RuleTime unknown
带自锁/回弹卡扣或窗口读数设计的头围尺，可单手操作固定读数，适合独自给哭闹扭动的婴儿测量；无固定设计的普通软尺需双手配合，实际操作误差更大
1
Sources
82%
Confidence
Long-term
Relevance
-
First Seen
Sources
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