NFF怎么读

For example, do the reports often say Not Fault Found?( NFF) or show the same repair being done ( the same component replaced) to all LRUs of a particular P/ N?

比如：报告上是否说“没有发现故障（NFF）”或同一个P/N的LRU都做了相同的修理（更换了同一个部件）？

The FR resin was past several testing like China Railway Standard, Germany DIN 5510 and France NFF 16-101 and used in FRP industry.

其力学性能好，阻燃等级高，此种阻燃树脂通过了中国铁道标准、德国DIN5510和法国NFF16101等标准检验并在玻璃钢工业中获得了很好的应用。

In this paper a new method is presented on the problem of the intensity fluctuation of a He-Ne laser in NFF type fiber optic sensor system.

本文针对He-He激光器的光强波动问题提出了一种新方法。