Daim iav polishing, tseem hu ua buffing lossis mechanical polishing, yog txheej txheem uas cuam tshuam rau kev ua cov hlau nto tsis tshua muaj siab thiab ci. Nws yog feem ntau siv hauv tsheb, hniav nyiaj hniav kub, thiab kev lag luam tsim khoom los tsim cov khoom zoo, tsis muaj qhov tsis zoo ntawm cov hlau thiab cov khoom. The goa...
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