Unverified85% confidenceFactTime unknown
判断固定稳定性看是否有下巴托和胸骨支撑:合格硬托应限制头部前屈、后伸和旋转三个方向,仅靠围颈一圈的软托无法限制旋转
1
Sources
85%
Confidence
Long-term
Relevance
-
First Seen
Sources
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