Those who snore only when sleeping on their back, placing a pillow under their upper back may encourage them to change sleeping position and shift onto their side or front, 'says Dr Shneerson.
For those who snore only when sleeping on their back, placing a pillow under their upper back may encourage them to change sleeping position and shift onto their side or front.
而对于那些仅在仰卧时才会打鼾的人，可以在他们的背部放上一个枕头，这样来促使他们改成侧睡或者俯卧。
3
Die match tolerances are to allow for shift in the upper die with respect to the lower die.