702 / | HD | DATA PROCESSING: MEASURING, CALIBRATING, OR TESTING |
* | DD | APPLICATIONS (364/400) {2} |
* | DD | .~ Electrical/electronic engineering (364/480) {1} |
FOR 111 | DF | .~.~ Power generation or distribution (364/492) {3} |
FOR 112 | .~.~.~ Economic dispatching (364/493) |