The variation of R wave amplitude has little relation with cardiac output, heart pumping function, especially with pulmonary wedge pressure.
波振幅的改变与心输出量及心脏的泵血功能，尤其是肺动脉楔压之间无明显关系。
By using a wave generator, the self -exciting pressure waves can be generated when well pumping unit works.
抽油井正常工作时，借助波动器可在井底产生自激压力波。
The pumping light wave and the laser oscillation wave are determined by the ultraviolet-visible absorption spectra and fluorescence spectra, respectively.
由吸收光谱确定泵浦光波长，由荧光光谱确定激光振荡波长。
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