碳纤管规格：2mm*1mm,2.5mm*1.5mm,3mm*2mm,3mmm*1.5mm,35mm*2mm,3*mm*2.5mm,

4mm*2mm,4mm*2.5mm,4mm*3mm,5mm*3mm,5mm*3.5mm,6mm*4mm,6mm*5mm,7mm*5mm,7mm*6mm,

8mm*5mm,8mm*6mm,8mm*7mm