1. Dab tsi yog machining.Feem ntau, cov cuab yeej siv tshuab xws li hlau txiav lathes, milling, xyaum, kev npaj, sib tsoo, drilling thiab lwm yam cuab yeej tshuab ua ntau yam txheej txheem ntawm lub workpiece, kom lub workpiece tuaj yeem ua tiav qhov yuav tsum tau muaj qhov tseeb thiab s ...
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