The plume temperature is an important parameter, for solidpropellantrocket engines and it is useful for determining the combustion process of the engine.
推进剂的羽焰温度是固体推进剂火箭发动机的重要参数，对于研究发动机内的燃烧过程具有重要价值。
2
China has undertaken to research and develop composite solidpropellantrocket motors since 1958.
中国从1958年开始复合固体推进剂火箭发动机的探索和研制工作。
3
A conception of adjustable solidpropellantrocket motor was proposed.