F.I.V.R.E. thermoionic valve for Marconi therapy

Vacuum valve for the Marconi therapy: a therapeutic procedure used mainly for joint diseases or in the aftermath of sprains, dislocations or fractures and in neuralgia and sciatica. This therapy is based on subjecting parts of a human organism to the action of ultra-short electromagnetic waves at very high frequency, placing the patient in contact with the electrodes.