... , 3M grinding, Ra0.005, finish14, Precision: temperature difference≤±1°C, thermal deformation≤0.01mm, concentricity≤0.001mm, straightness≤ ... HRC55~58.2. Inner structure.3. Precision: temperature difference <= 1°C, heating transform <= 0.02mm, concentric <= 0.005mm.Teflon ... . Donghui Roller’s buildings: Donghui Roller’s office: How to get Donghui Roller?Shanghai Donghui Roller specializes in making high ...