térfogatcsúsztatású
Térfogatcsúsztatású is a Hungarian term that translates to "volumetric displacement" or "positive displacement" in English. It refers to a type of pump or engine mechanism where a fixed volume of fluid is moved with each cycle of operation. This is in contrast to dynamic pumps, which impart velocity to the fluid to create flow.
In volumetric displacement devices, the working chamber's volume expands to draw in fluid, and then contracts