铅笔制造

铅笔制造

 

所以……答案是砂纸。

观看时,我的心情会变得平静。

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评论 5
  • 个人资料图片
    Asifa farzana
    # 41 : Good post , thank you for sharing. 
    • 个人资料图片
      Jay
      作家
      Thank you as well! 
  • 个人资料图片
    BLK
    So that's how they sharpen the pencils. 
    • 个人资料图片
      Jay
      作家
      Yeaaah. Even this method was the way in personal use in the past as well. 
  • 个人资料图片
    Freddie Aziz
    Assembly lines are still being used?! Crazy!