Pump body and impeller flow channel formed between the ring, and inhalation of the mouth at the impeller outlet are outside the circle of the Department.
2
有时游泳的人把它称为“呼吸进口袋”，因为它看起来就象在你头边有一个空气袋。
Sometimes swimmers call this' breathing into the pocket 'as it feels like there's a pocket of air there by your head.
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