♥ Adjustment and Installation: This tuning fork produces 2 different vibrations: Vibration C64 Hz with dampers (as marked on steamers) .Vibration C128 Hz without the dampers .The two dampers must be flush with the lower edge of the value markings of the two forks. .The imprint "C64" on the dampers and the imprint "C128" on the tuning fork must all point to the user when the dampers are mounted
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