美国必宝牌油石颜色AS-9(红色)油石A0(白色)油石粒度150#320#500#150#320#180#600#规格220#400#600#220#400#1/16×1/416.818.826.116.118.221.81/16×1/217.319.323.117.219.421.81/8×1/817.319.32617.219.421.81/8×1/416.317.421.216.217.420.21/8×1/218.219.323.918.119.423.51/4×1/416.317.521.216.817.520.21/4×1/221.422.729.420.722.627.31/4ROUND31.541.84931.536.547.73/8ROUND38.443.750.237.241.348.4)