通过流线和压力分布等研究混合推进系统流场特点。
The characteristics of hybrid propulsion are researched according to streamline and pressure distribution.
为了获得更好的混合效果，在虾饲料造粒机的原料加料部分使用了不连续的推进叶片。
For better mixing result, the uncontinuous propelling blades are used in ingredient feeding section of the prawn feed pelleter.
固体燃料火箭发动机的构造更简单、分量更轻，而且相对更安全。 在固体燃料火箭发动机里，燃料和氧化剂被预先混合成稳定的液态推进剂，然后被塞满火箭发动机的燃料箱里。
Solid-fuel rockets, in which the fuel and oxidiser are pre-mixed into a stable, solid propellant and then packed inside the case of the rocket, are simpler, lighter and relatively safer.
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