contact life

• 电触头寿命

contact life的用法和样例：

例句

1. The previous methods to improv the servce life of the plug were described, and it was pointed out to carry on the research on RE-aluminium alloying to increase the plug life.
   对过去提高顶头寿命的工作作了简介，提出开展稀土铝合金化提高顶头使用寿命的研究。