The test results indicated that the strength of concrete could be estimated by supersonic velocity values.
结果表明由超声波测试得到的声速值可以方便地估算出混凝土的强度。
Then, the base bleed method is introduced on a general supersonic missile to decrease the base drag of the inlet cowl for the first time and is validated by wind tunnel test.
本文首次将底部排气法应用于导弹上，结合一种具有常规气动布局的超声速导弹进行了底部排气方案设计，采用一种“底窝器”来提高进气道整流罩的底部压强，并进行了风洞实验验证。
Conventional and freeze-thawed concrete specimens were detected by a universal test machine. The relationship between supersonic velocity and loading was obtained.
采用常规混凝土和冻融混凝土为试件，在材料万能试验机上进行了破坏实验，得到了不同荷载作用下超声波的波速。
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