| 摘要 |
A method of and apparatus for displacing fluids in which a housing is provided which has an end wall and an opening opposite the end wall. A blade is positioned in the housing and rectilinear motion is imparted to the blade so that one end of the blade is moved while the other end dwells so that fluid is drawn in to one side of the blade and expelled by the reducing volume on the other side of the blade.
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