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Class Information
Number: 417/501
Name: Pumps > Expansible chamber type > Pumping member position controlled port > Having coextensive distributor opposite pumping member end face
Description: Apparatus including a distributor positioned in facing relationship with the pumping member end face, the area of the movable portion of the distributor or the movable portion of the valve which seats on the nonmovable portion of the valve being substantially the same as the area of the pumping member end face.
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