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Perform the following operation.
Lubricating Film
A thin layer of liquid or substance applied to surfaces to minimize friction and wear, commonly found in mechanical systems, joints, and tissues.
Smooth Surface
A surface with an even and uninterrupted texture, free of noticeable bumps, ridges, or indentations.
Synovial Fluid
A viscous fluid found in the cavities of synovial joints that reduces friction between articular cartilages during movement.
Friction
The resistance that one surface or object encounters when moving over another, often resulting in the generation of heat.
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