[A method of determining the permissible time of working with vibration-generating hand-operated machines].

To limit the hazardous action of local vibration, a special nomogram was elaborated to determine, basing on newly established hygienic norms and regulations, the admissible duration of working with hand-operated vibrators. The normogram was based on the relation of vibrocontact duration to the vibration intensity, and was recommended to be applied to hand-operated vibrators with vibration intensity lower 10 cm/s (126dB).