1. Mechanical polishing Mechanical polishing ndi kudalira kudula, mapindikidwe a pulasitiki a pamwamba pa zinthuzo kuti achotse mbali yowoneka bwino ya malo opukutidwa ndikupeza njira yosalala pamwamba pa kupukuta, nthawi zambiri amagwiritsa ntchito miyala ya mafuta, mawilo a ubweya, sandpaper, etc. , makamaka zoyendetsedwa ndi manja, ...
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