The rocket exhaust plume causes the effects of noise, smoke, flame and heat radiation, environment pollution and signal attenuation, etc. So it is important to study exhaust plume.
火箭羽流会造成噪声、烟雾、热辐射、环境污染和信号衰减等多种效应，因此研究排气羽流问题至关重要。
Two color pyrometers were developed to solve the problem of signal attenuation by intervening smoke or fumes.
为了解决由烟或气所引起的信号衰减问题，研制出了双色高温计。
Acidity and infrared attenuation ability of water, methanol and ammonia using titanium tetrachloride as liquid smoke agent were studied in detail.
分别使用纯水、甲醇溶液、氨水等试剂与四氯化钛成烟，对烟雾的酸碱性及红外衰减性能进行了实验研究。
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