This work investigates friction and wear properties of non-smooth surface material,on which many concaves and striae called non-smooth units distributed regularly.

 
  • 用作瓶制工艺品的密封蜡应该具有表面光滑、无裂纹、粘附性强和在外力作用下不易断裂等特点。
今日热词
目录 附录 查词历史