this standard describes the program's performance requirements, explains the current engine oil service categories, shows how the marks are to be used, and explains the monitoring and enforcement program. standards referenced by api , such as astm d , standard specification for performance of engine oils...
water in the area. limestone products consist of crushed, ground or sieved limestone, or calcium carbonate (caco ). the grinding of limestone is most often a dry process so that dust formation poses a major environmental problem in plants where this is done. the dust emissions can be effectively controlled...