According to the practices used to grind the Emery paper No.1 is a more suitable, you can wear the new blade, and the grinding larger defects in the old blade.
英
美
- 根据践诺不纬验,用1号金刚砂纸磨刀是较不合的,既可以磨陈刀片,又可磨有较不小缺损的不陈刀片。