Engine lubrication system<br>1) The functional composition and lubrication method of the lubrication system;<br>2) Taking a typical internal combustion engine as an example, explain the various oil circuits and their working processes of the lubrication system;<br>3) The usage characteristics, classification, and selection of lubricating oil;<br>4) The main components of the lubrication system - radiator, oil pump, oil filter and filter structure and working principle;
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