什么牌子的汽车导航好:请人翻译

原文
NRC researchers identified a number of parameters that determine the potential quality of foam, including the air injection and the mixing process, the length of the mixing zone, the number of bends in the piping, and the type of nozzle used. Having resolved these issues, NRC researchers could consistently generate foam with an expansion ratio of 4:1 to 20:1, although, for firefighting purposes, the range of 4:1 to 10:1 was used. Expansion ratio is the final volume of foam compared to the original volume of foam solution.
In the early experimental program at NRC, researchers tested CAF in open spaces and in compartments because these spaces have different extinguishment regimes. Three fuels--heptane and diesel liquid fuels, and wood cribs—were evaluated, as were Class A and B (AFFF) foams. Concentrations of the foam to water were 0.3 percent for Class A foam and 1 to 3 percent for Class B foam, which was less than half
that needed for air-aspirated systems. Both single-nozzleand two-nozzle systems were successfully tested. Theperformance of the CAF system was also compared tothose of water mist and standard sprinkler systems forthe same fuels.

翻译文
NRC 研究员识别了决定泡沫的潜在质量的一些叁数, 包括空气注入和混合程序，混合地域的长度, 在吹笛 , 和被用的喷嘴的类型中的弯曲的数字。 有决定这些议题, NRC 研究员可以一致地用 4 的扩充比产生泡沫:1 到 20:1, 虽然, 为枪战目的, 多种的 4:1 到 10:1 被用。 扩充比是与泡沫解决的最初体积相较了的泡沫的最后体积。
因为这些空间有不同的熄灭政权，所以在 NRC 的早实验的计画中，研究员在开着的空间和区划中测试了 CAF 。 三燃料--heptane 和柴油液体加燃料, 和木材婴儿床-被评估, 如同是分类一和 B(AFFF) 泡沫。 对水的泡沫的集中是班级 B 泡沫的班级一泡沫和 1 到 3 百分比的 0.3%, 比一半更少
那的需要空气送气发音的系统。 两者的单一 nozzleand 二喷嘴的系统成功地被测试。 CAF 系统的 Theperformance 也被比较水雾和标准洒水车系统 forthe 的 tothose 相同的燃料。