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H03J1/00—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
H03J1/06—Driving or adjusting arrangements; combined with other driving or adjusting arrangements, e.g. of gain control
H03J1/14—Special arrangements for fine and coarse tuning
FR634779D1927-05-211927-05-21Dispositif de réglage à démultiplication par engrenage et friction pour condensateurs électriques et appareils analogues
ExpiredFR634779A
(fr)