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the undulating pattern of marks in a machined surface from the vibration of the tool or workpiece
Prolonged undesirable opening and closing of electric contacts, as on a relay. Also known as contact chatter.
An irregular alternating motion of the parts of a relief valve due to the application of pressure where contact is made between the valve disk and the seat.
Vibration of a disk-recorder cutting stylus in a direction other than that in which it is driven.
A type of vibration in a hydraulic pump resulting from the ingestion of air into the system.