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An electromachining process in which the discharge is initiated by allowing the tool and workpiece to come into contact, after which the tool is withdrawn and an arc forms.

Related Terms

FILTER ELEMENT

The porous device that performs the actual process of filtration. Also known as Cartridge

HYDROFINISHING

A process for treating raw extracted base stocks with hydrogen to saturate them for improved stability.

CUTTING FLUID

Any fluid applied to a cutting tool to assist in the cutting operation by cooling, lubricating or other means.

ACID ATTACK

Caused by an incomplete flushing after an acid cleaning process of boilers or similar equipment.

ABSORPTION

The assimilation of one material into another; in petroleum refining, the use of an absorptive liquid to selectively remove components from a process stream.

CRACKING

The process whereby large molecules are broken down by the application of heat and pressure to form smaller molecules.

ADIABATIC PROCESS

A thermo-dynamic process in which no heat is extracted from or added to the system of the process.

HALVING

The process of adjusting magnetic compass correctors so as to remove half of the deviation on the opposite cardinal or adjacent intercardinal headings to those on which adjustment was originally made when all deviation was removed. This is done to equalize the error on opposite headings.

HUMMOCKING

The pressure process by which sea ice is forced into hummocks. When the floes rotate in the process, it is called SCREWING.

FLUSHING

A fluid circulation process designed to remove contamination from the wetted surfaces of a fluid system.
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