notching [′näch·iŋ]
Joining of timbers, usually meeting or crossing at right angles, by cutting a notch in one or both pieces.
Notching
(electricity)
Term indicating that a predetermined number of separate impulses are required to complete operation of a relay.
(mechanical engineering)
Cutting out various shapes from the ends or edges of a workpiece.
notching
notching
Notching
(in mining), the process of making a cut in a mineral (coal, rock salt, and so on). Supplementary free surfaces are notched in the seam to be worked to facilitate breaking-out. Until the early 20th century, notching was done mainly by hand by miners and was one of the most laborious processes; notching is now performed by cutting machines.
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