Chin cup helps to position the facepiece properly.
下巴杯面罩有助于正确位置。
Position the respirator under you chin with the nosepiece up.
将呼吸器置于下颚下端，并且将鼻梁夹朝上。
Keep your head in a neutral position with your chin slightly raised.
保持头部在中立位置，并稍微抬起你的下巴。
Keep your head in a neutral position with your chin slightly raised.
保持头部在中立位置，并稍微抬起你的下巴。
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