Unverified78% confidenceDecision RuleTime unknown
U型开口宽度应比自己下巴到锁骨距离略窄，开口过宽（如宽于12cm）无法固定下巴导致头部前倾，飞机上无法稳定支撑
1
Sources
78%
Confidence
Long-term
Relevance
-
First Seen
Sources
Related Entities
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