369 / | HD | DYNAMIC INFORMATION STORAGE OR RETRIEVAL |
176 | DF | DYNAMIC MECHANISM SUBSYSTEM {8} |
215 | DF | .~ Having power driven transducer assembly {6} |
219 | .~.~ With drive transverse to storage track during storage or retrieval {4} | |
220 | DF | .~.~.~> Controlled by transducer assembly support |
221 | DF | .~.~.~> With additional drive (e.g., scanning, restoring, or return) |
222 | DF | .~.~.~> Having pivoted tone arm |
223 | DF | .~.~.~> By lead screw |