precleaning
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precleaning — v. clean in advance, remove dirt beforehand, wash or rinse ahead of time … English contemporary dictionary
Page replacement algorithm — This article is about algorithms specific to paging. For outline of general cache algorithms (e.g. processor, disk, database, web), see Cache algorithms. In a computer operating system that uses paging for virtual memory management, page… … Wikipedia
Ion source — An ion source is an electro magnetic device that is used to create charged particles. These are used primarily within mass spectrometers or particle accelerators.Mass spectrometry In mass spectrometry, an ion source is a piece of equipment used… … Wikipedia
Flux-cored arc welding — (FCAW) is a semi automatic or automatic arc welding process. FCAW requires a continuously fed consumable tubular electrode containing a flux and a constant voltage or, less commonly, a constant electric current welding power supply. An externally … Wikipedia