limited diffusion current density 极限扩散电流密度
The experimental results show that the performance and limited current density of the PEMFC are enhanced with increasing operational temperature.
结果表明：升高电池温度可提高PEMFC的性能及极限电流密度；
Using density current to eject sediment is one of the most effective methods for both prolonging reservoir working life and saving the limited water resource.
运用异重流对水库进行排沙是延长水库寿命并节约清水资源的行之有效的重要方法。
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