A.φ6.5 B.φ8 C.φ10 D.φ12
A.φ6~8mm B.φ8~10mm C.φ10~15mm D.φ15~20mm
A.0.2~0.5m/min B.0.5~1.0m/min C.0.1~1.5m/min D.1.5~2.0m/min