Thaum machining cov ntaub ntawv hlau, nws yog ib qho tseem ceeb kom tau txais cov txiaj ntsig zoo.Nyob rau hauv no hais txog, craftsmanship ntawm lub qhov tob machining yog qhov tseem ceeb, thiab muaj cov cuab yeej zoo yog qhov tseem ceeb.Qhov sib sib zog nqus qhov drilling tshuab, sib sib zog nqus qhov tho tshuab, thiab qhov sib sib zog nqus tig thiab dov tshuab yog txhua yam ...
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