Disclosed is a method and a machine (displacement machine or similar) used to convey transportable media (gaseous, liquid, pasty or trickling). The drive produces a migrating wave.

 
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< Pumping system for controlling pumping speed during discharge pressure fluctuations

< Wave energy conversion system

> Gear pump with gears having curved teeth and method of feeding elastomeric material

> Compressor provided with torque limiter
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