Method will provide a way to move an object—bellows—into a liquid, object—bellows—will experience a sum of buoyancy as it move into liquid. Object—bellows—will then experience a new different sum of buoyancy as it move out of liquid. Change in sum of buoyancy can be result of taking energy from move into liquid phase putting energy into move out of liquid phase. This change in sum of buoyancy can be used in any way useful, especially to produce, generate, energy. Method can be employed on large scale or small scale; I will suggest example of method but there are infinite, many ways to produce different buoyancy sum.
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