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Well that blows


Digital_photog
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Pushing down on the lever lifts the lower portion of the bellows, which appears to be anchored in the center. Am I right in guessing that the top portion of the bellows lifts from the air pressure, then settles by gravity, smoothing the air flow ?

Is there a separation between the 2 halves ?

A check valve ? 

So how does a bellows work ?

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