Slowly close the valve, reduce the intensity of shock wave.

缓慢关闭阀门，削减冲击波的强度。

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Modulating the ultrasonic wave, intensity and period of the light pulse will change.

调节超声波，可改变光脉冲的强度和周期。

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Modulating the ultrasonic wave, intensity and period of the light pulse will change.

调节超声波，可改变光脉冲的强度和周期。

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