... 1, Introducing the original finishing and polishing facilities from US ,with the highest finish of Ra0.01μm (Grade XIV),being ... 2,000 mirror rollers of various specifications annually,with the largest specification of φ800x 5000; 4, Widely used for the surface ... processing;6, Its center is installed with channel or jacket, so that its temperature difference of cooling or heating will not surpass ±1°C ...