Vitrified diamond wheels widely used in wafers (semiconductor wafers and solar wafers), diamond composite wafers, diamond polycrystalline, diamond tools, cubic nitriding in developed countries in Europe and America. Boron, tungsten steel (hard alloy), new engineering structural ceramics, gemstones, crystals, rare earth materials (magnetic materials) and other high-hardness and brittle materials are machined, and good economic benefits have been achieved.