174 / | HD | ELECTRICITY: CONDUCTORS AND INSULATORS |
8 | DF | WITH FLUIDS OR VACUUM {12} |
15.1 | .~ With cooling or fluid feeding, circulating or distributing {6} | |
15.2 | DF | .~.~> By heat pipe |
15.3 | DF | .~.~> For bushing or pothead |
15.4 | DF | .~.~> Superconductive type {1} |
15.6 | DF | .~.~> For cable, conductor or joint |
15.7 | DF | .~.~> For welding or furnace cable |
16.1 | DF | .~.~> By ventilation or gas circulation {2} |