Magudumu a Brown corundum ndi chimodzi mwa zida zomwe zimagwiritsidwa ntchito kwambiri ndi abrasive ndi kuchuluka kwakukulu.Akagwiritsidwa ntchito, amatha kusinthasintha mothamanga kwambiri, ndipo amatha kupukuta movutikira, kugaya pang'onopang'ono ndikupera bwino komanso kudula ndi kudula pa bwalo lakunja, bwalo lamkati, ndege ndi mitundu yosiyanasiyana yazitsulo kapena zopanda zitsulo.
Nthawi yotumiza: Mar-08-2023