A cutaway, in the industrial sense, refers to the display of a manufactured product, (an engine, a pump, a regulator, etc. . .) where a portion of the exterior housing has been removed to reveal the internal components, (pistons, bearings, seals, etc. . .) and their relationship to the functionality of the product. To see examples of various product cutaways, you can visit the websites of cutaway specialty companies, such as http://www.calcocutaways.com CalCo Cutaways.