This is from Toptech Company.Our company specializes in the manufacture of equipments of LCD semiconductor, industrial machines, and parts of hydraulic systems.We manufacture Hydraulic Piston Ring A8VO107 and 9 more products, and we also deliver Casappa, PMP, Hammer OEM through other companies. *hydraulic Piston Ring's longitude remains at HRC 61-63 and is a firm and precise product.* *We manufacture and lap valve plate of 0.05 position concentricity, 0.02-0.03 even/flat floor plan through lathe CNC Machine.Moreover, we manufactured samples of drive shaft and valve plate which has undergone a 6000-hour test. We supply a large number of other products. We have superior CNC Machine Center technology that instead of grinding Drive Shaft, we completely manufacture surface roughness of 0.2S through Machine Center. We produce Drive Shaft's sphericity (spherical shape larger than the radius, for example, shape of a 1/3 cropped soccer ball.)As a company that manufactures parts that make up semiconductor equipments, we provide dignified, high-quality products.