文章研究了如何利用发动机地面试验数据，来评估飞行中的性能参数及其可靠性。
How to use data gotten is ground tests to estimate the performance parameters and the reliability in future flying is studied in this paper.
文章介绍了油管防落装置的结构、工作原理、使用要求、地面试验和现场应用情况。
This paper introduces the structure, working principle, using request, ground test and field application of the tubing dropping control unit.
1958年，圣易路斯的科学家们就开始收集婴儿的牙齿以研究地面试验与人类接触之间的联系。
In 1958 scientists in st Louis began a campaign to collect baby teeth to study the link between above-ground testing and human exposure.
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