... 30 1 1 -10,...,-1 0 +1,...,+5 0.4 I - 18 2 1 -10,...,-1 0 +1,...,+5 0.4 ... I 18 30 2 1.5 -10.5,...,-1.5 0 + ... 26 - 6 6 -30,...,-6, 0 3 I - 26 10 6 -30,...,-6, 0 5 I 26 - 10 10 -40,...,-10, 0 ... Grade Ra max 0 0.1 0.125 1.25 I 0.125 0.16 1.25 II 0.16 0 ... 2.5 SUZHOU YONGQI MULTIPLIED CERAMIC CO.,LTD.C E R A M I C I N N O V A T O R ...