1. The raising of a substance to its ignition point, as by electric current, friction, or mechanical shock. 
   点火通过电流、磨擦或机械碰撞使物质达到其燃点
2. ignition system of gasoline engine 
   汽油机点火系统
3. friction of metal working 
   塑性加工过程的摩擦
4. powder metallurgy friction material 
   粉末冶金摩擦材料
5. produce by ignition; as of fire. 
   用点燃的方式制造；比如火。

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