Taw qhia: Hlau polishing yog txheej txheem tseem ceeb hauv kev txhim kho cov tsos thiab zoo ntawm cov khoom hlau.Txhawm rau ua tiav qhov xav tau tiav, ntau yam khoom siv tau siv rau kev sib tsoo, polishing, thiab kho kom zoo nkauj ntawm cov hlau.Cov khoom siv no suav nrog abrasives, polishing compounds, buffing whe ...
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