197612 ⎘
Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor; Arrangements of heads; Arranging, supporting, or driving of heads or of transducers relatively to record carriers; Supporting in balanced, counterbalanced or loaded operative position during transducing , e.g. loading in direction of traverse by elastic means, e.g. spring
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