如题所述
钢笔的ef、f、m是钢笔笔尖的.型号。
EF=XF=Extra Fine 笔尖的宽度约:0.24mm~0.28mm;
F=Fine 笔尖的宽度约:0.28mm~0.34mm;
M=Medium 笔尖的宽度约:0.34mm~0.44mm。