| 摘要 |
The procedure uses a source of pressurized liquid and a vacuum source consisting of a continuous liquid jet and vacuum aspiration at the same recurrence frequency so that the liquid emerges from the hand piece in pulses at a set frequency and a pressure of 10 to 100 bars. The pulse and aspiration frequencies are variable between 0.1 and 10 Hz, and the duration of each output pulse starts and ends before the first half of the aspiration stroke.
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