821 34 a 2 34 stands for the cross sectional area of the through hole 822 34 a 3 34 stands for that of the guide hole 842 and 34 a 4 34 stands for that of the rotating hole 851 and if the inner minimum cross sectional areas of the scattering ring 82 and the rotating and converging cylinder 85 are all equal to the cross sectional area 34 a 34 of the input output pipe without regarding the separating cylinder 841 and the separating ring 871 since they have no relation to the pressure varying function but merely the separating function then the total cross sectional area of the small holes 821 is u03c3a 1 n the total cross sectional area of the through holes 822 is u03c3a 2 n the total cross sectional area of the guide holes is u03c3a 3 n the total cross sectional area of the rotating holes 851 is u03c3a 4 n in accordance with the quality and the viscosity of the fluid mixed the diameter of the small holes 821 and the through holes 822 should have the best size under approx 2 5 mm and in accordance with the flowing processes through the said channel the fluid pressure will promptly be lowered after passing each of said channels and the pressure will be lifted to a pre determined level after passing the next channel then the.