In materials science research, metallographic preparation is a crucial link, and the grinding and polishing step is the key to ensuring high-quality metallographic samples. However, researchers often encounter a series of problems when performing metallographic grinding and polishing, such as grinding and polishing marks, sample cracks, uneven polishing fluid, etc. Shenyang Kejing's UNIPOL-820 dual platens lapping and polishing machine is specially designed to solve these problems and can help researchers complete metallographic preparation more efficiently and obtain clear and accurate metallographic observation results.