引导声波束的发射罩形成等离子体禁闭球，将能量包裹在球体中。

The energy is enveloped in a plasma containment sphere shaped by emitter cowls that channel the sonic beam.

youdao

分析有限声波束从平面液-固界面上散射的困难主要发生在平面波反射系数的处理上。

For scattering of a bounded acoustic beam from a liquid-solid interface, the principal difficulty comes from the treatment of tie plane wave reflection coefficient.

youdao

并根据宽波束超声波流量计的特点重点进行了自动增益控制放大器和跟踪带通滤波器的设计。

Based on the characteristic of the Wide-beam ultrasonic flowmeter, automatic gain control amplifier and the tracking band-pass filter are devised.

youdao