打呼是有几方面的因素造成的，但是罪魁祸首是喉管内过份松弛的肌肉和组织，在狭窄的呼吸道内发出声响。
Snoring is caused by a few things, but the biggest culprit is a vibration of very relaxed muscles and tissues in the throat, which rattle against narrow breathing passages.
大喉管经改进后构成一段内螺旋管件，有利于提高油的雾化质量。
The improved big throat pipe forms a section of internal spiral pipe component, which is favorable to improve the quality of the oil atomization.
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