... pulse recurrence frequency脉冲重复频率 pulse reflection method脉冲反射法 pulse repetition period脉冲重复周期 ...
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ultrasonic pulse reflection method 超声脉冲反射法
low voltage pulse reflection method 低压脉冲反射法
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Acoustic velocities of tap water and polymer solution were studied using ultrasonic-pulse reflection method in the laboratory. Polymer density and apparent viscosity were measured.
采用脉冲反射法在实验室条件下对自来水和不同浓度聚合物溶液的声速进行了测量研究，经测量得到了聚合物溶液的密度、表观粘度。
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