A为避免不必要的磨损，将表面涂漆。
B为避免不必要的颗粒，将表面清洁。
C为避免不必要的摩擦，将表面抛光。
To prevent unwanted friction, polish the surface.
Use cellophane to prevent damage to the surface.
Polish the surface with a soft cloth until it becomes shiny.
Record all repairs to the skin surface.
friction
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