LAP


Meaning of LAP in English

( n. )

The amount by which a slide valve at its half stroke overlaps a port in the seat, being equal to the distance the valve must move from its mid stroke position in order to begin to open the port. Used alone, lap refers to outside lap. See Outside lap (below).

Webster's Revised Unabridged English Dictionary.      Пересмотренный полный словарь английского языка Webster.