360 / | HD | DYNAMIC MAGNETIC INFORMATION STORAGE OR RETRIEVAL |
69 | DF | AUTOMATIC CONTROL OF A RECORDER MECHANISM {3} |
71 | DF | .~ Controlling the record {3} |
74.1 | .~.~ Stopping or reversing {4} | |
74.2 | DF | .~.~.~> Responsive to reel rotation |
74.3 | DF | .~.~.~> Responsive to tape tension |
74.4 | DF | .~.~.~> Responsive to magnetic recorded signals |
74.5 | DF | .~.~.~> Responsive to physical property of record {2} |