2.Oiling or lubricating with graphite or grease the moving parts of a machine.
3.Providing all bearings or wheels between the moving parts of a machine or vehicles reduce friction and allow smooth movement as rolling friction is less than sliding friction.
Answers & Comments
Answer:
1.Polishing the rough surface.
2.Oiling or lubricating with graphite or grease the moving parts of a machine.
3.Providing all bearings or wheels between the moving parts of a machine or vehicles reduce friction and allow smooth movement as rolling friction is less than sliding friction.
Explanation:
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