Check the convoluted air bellows on the centre bearing for damage.

检查中心轴承上的回旋式风箱是否损坏。

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Check the convoluted air bellows on the front cardan shaft for damage.

检查前万向节轴上的回旋式风箱是否损坏。

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For compressed air and vacuum, the Numatics poppet valves are ideal for single acting cylinders, air bellows, and vacuum material handling.

压缩空气和真空，纽曼帝克提升阀是适用于单作用气缸，空气波纹管和真空材料处理。

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Alternating current causes two plates to attract or repel each other, sucking air in or blowing air out like as a tiny bellows would -- one that resonates at over 100Hz.

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In other words the iron lung is sealed and attached to bellows, which lower the air pressure inside the iron lung to create a negative pressure.

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