257 / | HD | ACTIVE SOLID-STATE DEVICES (E.G., TRANSISTORS, SOLID-STATE DIODES) |
678 | DF | HOUSING OR PACKAGE {18} |
712 | DF | .~ With provision for cooling the housing or its contents {6} |
718 | DF | .~.~ Heat dissipating element held in place by clamping or spring means {1} |
719 | .~.~.~ Pressed against semiconductor element |