277 / | HD | SEAL FOR A JOINT OR JUNCTURE |
FOR 140 | DF | WITH DISTINCT RADIALLY ACTING BIAS(277/138) {16} |
FOR 159 | DF | .~ Periphery engaging spring (277/157) {3} |
FOR 160 | DF | .~.~ Incompatible shapes (277/158) {3} |
FOR 161 | .~.~.~ Radially extending tongues (277/159) |