supersonic 考研雅思

Piezoelectricity type supersonic generator works actually using the resonance of piezocrystal.

压电式波生器实际上是利用压电晶体谐振来工作。

These planes travel at supersonic speeds.

这些飞机以音速速度飞行。

In gasdynamics and chemical lasers, the supersonic diffuser plays an important role in the pressure recovery system.

在气动和化学强激光器系统研制中，压力恢复系统扩压器设计技术研究具有重要工程应用价值。

Shell Aviation specially developed AeroShell Turbine Oil 555 lubricant for Rolls Royce for use in supersonic transport.

这种航空润滑油是壳牌航空为罗尔斯·罗易斯公司生产音速飞机动机专门研制。

The showcase, by running a small train, displays Doppler speed testing, materials detection, noise monitoring, supersonic distance testing, track weighing, and photoreader, etc.

台用一个小火车运行来示多普勒测速、材料探测、噪检测、测距、轨道称重秤、光电计次等等。

The results show that the unstart boundary of supersonic inlets is mainly concerned with Mach number of freestream without considering the variation of angle of attack.

在不考虑攻角变化条件下，进气道不起动边界主要与来流马赫数有关。

On condition that the front body shape of the projectile is unchangeable,a formula is obtained for determining the relation between the optimum boattail angle and the supersonic flight region.

在弹丸前体外形和外界大气密度不变条件下，提出了利用弹丸炮口马赫数和顶点马赫数确定旋转弹丸最佳尾锥角方法。