E pa ana ki nga hua corundum ma me nga rahi matūriki mai i te 0-1mm, 1-3mm, 3-5mm, 5-8mm, 100 # – 0, 200 # – 0, me te 320 # – 0. ka mahia e te awheawhe whakarewa ka haria ki te awheawhe hanga kirikiri wahanga, ka kuruia e te kaiwawahi, katahi ka tirotirohia kia whiwhi ai i te hua corundum ma me te rahi o te matūriki i roto i tetahi awhe.Ko te nuinga ka whakamahia hei whakamaarama ahua, he whakamaarama amorphous, he tono kirikiri papa.
Te wa tuku: Maehe-22-2023