1. Mechanical Polishing Mechanical polishing bụ ịdabere na ịkpụ, nrụrụ plastik nke elu nke ihe ahụ iji wepụ akụkụ convex nke elu a na-egbu maramara ma nweta usoro nhazi nke ọma, n'ozuzu na-eji mpempe nkume mmanụ, wiil ajị anụ, ájá ájá, wdg. , tumadi ejiri aka rụọ,...
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