This classification encompasses all the substances and materials used in engineering applications related to fluid mechanics, lubrication, and metalworking processes. It covers various types of fluids, including fuels, lubricants, coolants, hydraulic fluids, and metalworking fluids, all of which are essential for the smooth functioning and efficiency of machinery and engineering processes. Understanding the properties, applications, and proper use of these fluids is crucial for engineers and professionals in a wide range of industries.
