___ helps in the lubrication of machines.
_____ plateaus are formed when the plateau is traversed by several rivers.
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Oil and grease are the most common. Grease is composed of oil and a thickening agent to obtain its consistency, while the oil is what actually lubricates. Oils can be synthetic, vegetable or mineral-based as well as a combination of these
plains, deserts, plateaus and islands. The land of India ... Geologically, the Peninsular Plateau ... high peaks, deep valleys and fast flowing rivers. The northern plains are formed of alluvial.
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