When people sleep on their front, their lower jaw is positioned further forward than normal.
因为当人们俯卧的时候，下颚会比平时更加突出。
Main products are: Continental C Series jaw crusher machine and its components, a moving jaw, front plate, back plate, dental plates, side guard, jaw plate, eccentric shaft, flywheel, bearing, etc.
主营产品有：欧式C系列颚式破碎机整机及其部件，有动颚、前板、后板、牙板、边护板、颚板、偏心轴、飞轮、轴承座等；
Moreover, the bones in the front part of a baleen whale's lower jaw, or mandible, aren't fused as they are in other mammals.
另外，须鲸下颚前部的骨骼，也就是所说的下颌骨，并不像其他哺乳动物一样是愈合在一起的。
The vice jaw on the flat hook at the front end of the hand handle bends inwards matching the relative flat hook.
在手柄前端的平钩上的钳口向里弯曲，形成与其相对的平钩相互吻合。
The vice jaw on the flat hook at the front end of the hand handle bends inwards matching the relative flat hook.
在手柄前端的平钩上的钳口向里弯曲，形成与其相对的平钩相互吻合。
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