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Effect of the jet on stone comminution (determined by the percent of fragments < 2.0 mm) after 250 shocks (a; H = 50 mm, p+ = 37 MPa) and 500 shocks (b; H = 80 mm, p+ = 35 MPa). Both experiments were repeated 6 times using a PRF of 2 Hz and Q = 35.7 cm3/s.
