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。
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。
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)?
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