而有些卫星则装配了火箭发动机和推进剂贮箱，这样可以控制它们的坠落路线，将其引导坠落到海洋之中，而不是坠落到居民区里。
Some satellites come equipped with a rocket engine and propellant tank so controllers can aim their descent into an ocean instead of a neighborhood, but not all.
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.
介绍了断裂力学在火箭推进剂贮箱安全评定中的应用。
An application of fracture mechanics to the safety evaluation of rocket propellent tank was presented.
介绍了断裂力学在火箭推进剂贮箱安全评定中的应用。
An application of fracture mechanics to the safety evaluation of rocket propellent tank was presented.
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