But the material of emitting cathode is mostly present with big escaping power, low reliability, low uniformity and emission capability.

目前，场发射阴极材料多种多样，但都存在逸出功大，稳定性及均匀性不理想，发射性能低等方面的问题。

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Now the key to fabricate FED device is to find a economical and credible cathode, which has excellent field emission capability and simple manufacture technology.

当今FED研究的关键是寻找场致发射性能良好、制作工艺简单、经济可靠的阴极。

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By a lot of performance tests, emission tests and combustion analysis tests, it has been proved that the new combustion system can give a good attention to power, economy, and emission capability.

大量的性能试验、排放试验和燃烧分析的结果表明，改进后的燃烧系统良好地兼顾了柴油机的动力性、经济性和排放特性。

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