折叠垫4展开后即构成一个床垫，再配上一个可充气的气枕5，可作为床供休息使用。
The folding pad 4 forms a bed pad after unfolded, and can be used for resting as a bed after matched with the inflatable pillow 5.
基于无气隙平稳充型浇注系统的设计原理，设计了摇枕铸件的浇注系统并进行了充型和凝固过程的计算机模拟。
Based on the principle of smooth filling casting system without gas gap, the casting system of bolster is designed.
负枕颈角可能导致上气道狭窄，加重了睡眠呼吸暂停。
Negative O-C2 angles may result in upper airway narrowing, increasing the severity of sleep apnea.
负枕颈角可能导致上气道狭窄，加重了睡眠呼吸暂停。
Negative O-C2 angles may result in upper airway narrowing, increasing the severity of sleep apnea.
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