An electric network for of clear layer, simple structure, standard connection, rational redundancy and appropriate advance technology is set up, "N-1" standard of city network is realized.
建立层次清晰、结构简单、接线规范、冗余度合理、技术适度超前的电网框架，实现城市电网“N - 1”准则。
The research result shows that advance force and stability ratio N are the main factors controlling …
研究表明，推进力和稳定比N是影响老隧道变形的主要因素。
Through reformatted the hydraulic pressure system of centrifuge type HR500-N, it increases push force and time of piston to advance the performance of the machine.
通过对原HR500-N离心机液压系统的改进，使活塞推料力和推料次数增加，促使整机性能提高。
The results of 15N tracing showed that the fertilizer-N uptake in rice plant and grain of two varieties increased with the advance of growth stage.
示踪结果显示，两个品种水稻植株和籽粒吸收肥料氮，都随着生育期的推移而逐渐增加。
The results of 15N tracing showed that the fertilizer-N uptake in rice plant and grain of two varieties increased with the advance of growth stage.
示踪结果显示，两个品种水稻植株和籽粒吸收肥料氮，都随着生育期的推移而逐渐增加。
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