Description: Characterization of a document in terms of the purpose or information it contains; Name: Document type
Description: classification of a document according to its purpose or the information it contains; Name: type of document
Description: average speed given by the stroke length multiplied with the number of complete pumping cycles of the piston, plunger or piston attached to the diaphragm per minute (stroke per minute or pump crank speed); Name: piston velocity