CO2 лазер нь үр дүнтэй, цэвэр зүлгүүрийн зүлгүүр. Sandpaper is a common auxiliary material for grinding and processing in daily production and life. It is widely used in many fields such as automobiles, furniture, carpentry, and sheet metal. ... зүлгүүр нунтаглагч машин зарна ...