TheContraplexis a fine impactmillwith two drivenpindiscs. In counter-rotating mode, much higher relative speeds are possible than with the UPZ fine impactmillwith only one drivenpindisc. The highest relative speed develops at the outermostpinrows and can be up to 240 m/s. The fineness can be adjusted by altering thepindisc speeds.
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