干燥空气是多种气体的混合，按体积计，大部分是氮气。

Dry air is a mixture of gases, most of which is nitrogen by volume.

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干燥空气是多种气体的混合物，按体积计，大部分是氮气。

Dry air is a mixture of gasses, most of which is nitrogen by volume.

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按体积计最多40%的气体的诱导剂，涡旋泵，和特殊的泵的设计，用于气体提取的有效性进行了讨论。

The effectiveness of inducers, vortex pumps, and special pump designs for gas extraction for up to 40 percent gas by volume are discussed.

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