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api 500 API RP 500 Recommended Practice for Classification of Locations for Electrical Installations at Petroleum Facilities Classified as Class I, Division I. API RP 500 defines two types of divisions: Division 1: An area in which nitable concentrations of flammable gases, vapors, or liquids

api 77 slot, API Audio 500-6B LUNCHBOX. . 38,500. . SKU..