307 / | HD | ELECTRICAL TRANSMISSION OR INTERCONNECTION SYSTEMS |
401 | DF | NONLINEAR REACTOR SYSTEMS (E.G., SATURABLE) {11} |
407 | .~ Logic circuits {4} | |
408 | DF | .~.~> Multiaperture |
409 | DF | .~.~> Clocking, delay or transmission line |
410 | DF | .~.~> Nor, Not logic circuit |
411 | DF | .~.~> Exclusive Or, And logic circuit |