The video source is howautowork.com.it is about engine bearing function,materails like tin,lead and copper also design consideration .with focus on split sleeves type,with overview on alloys function like hardness softness.
The video source is Howautowork.com.it is about piston rings functions,material selection to avoid wear.then describes compresssion rings and oil rings needs with focus on loading exerts on rings, with details of function of each.
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