@mm36yy
Active 3 년, 1 개월 전
http://www.zblongshine.com/abrasives-materials/
How do abrasives work?
Abrasives Materials are hard crystals that are either found in nature or manufactured. The most commonly used of such materials are aluminum oxide, silicon carbide, cubic boron nitride, and diamond.
Other materials such as garnet, zirconia, glass, and even walnut shells […] 보기