Finally the author summerizes the key points where grinding and maintenan- ce are important to Graf card clothing,C4 high-speed carding machine and rotor spinning system in Jinzhou Cottoh Mill.

• 最后综述格拉夫针布、C4高速高产梳棉机、及金纺气流纺纱工程在磨针及针布维修的重点所在。