360 / | HD | DYNAMIC MAGNETIC INFORMATION STORAGE OR RETRIEVAL |
69 | DF | AUTOMATIC CONTROL OF A RECORDER MECHANISM {3} |
71 | DF | .~ Controlling the record {3} |
73.01 | .~.~ Speed {3} | |
73.02 | DF | .~.~.~> Control of relative speed between carriers |
73.03 | DF | .~.~.~> Rotary carrier |
73.04 | DF | .~.~.~> Linear carrier {2} |