| 220 / | HD | RECEPTACLES |
| FOR 127 | DF | MULTILAYER BARRIER STRUCTURE (220/415) {23} |
| FOR 132 | DF | .~ Evacuated space between layers (220/420) {3} |
| FOR 133 | DF | .~.~ With intermediate insulating means (220/421) {2} |
| FOR 135 | ![]() | .~.~.~ Plus distinct reflector means (220/423) |