In the diamond list, Dongcheng ranked first than Kasen in Germany. On the whole, it's better in Dongcheng. The famous trademark of Jiangsu Province, Jiangsu famous brand and Jiangsu export famous brand

rhinestone is the abbreviation of water drilling rig, also known as diamond drill with water source or diamond drill, which belongs to one kind of electric drilling tools. At present, the diamond plays an important role in drilling holes in family life and engineering construction, and it is one of the essential electric tools in people's construction.