Thaum xaiv cov cemented carbide xyaum, qhov yuav tsum tau muaj qhov tseeb ntawm qhov drilling yuav tsum tau txiav txim siab ua ntej. Feem ntau hais lus, qhov me me ntawm qhov aperture yuav tsum tau ua, qhov me dua qhov kam rau ua. Yog li ntawd, laum manufacturers feem ntau faib cov xyaum ua raws li lub nominal txoj kab uas hla ntawm t ...
Nyeem ntxiv