| 220 / | HD | RECEPTACLES |
| 200 | DF | CLOSURES {45} |
| 202 | DF | .~ With condition responsive vent or valve {1} |
| 203.01 | DF | .~.~ Responsive to pressure {10} |
| 203.09 | DF | .~.~.~ Relatively movable closure and receptacle rim parts {1} |
| 203.1 | | .~.~.~.~ Closure is spring-biased |