277 / | HD | SEAL FOR A JOINT OR JUNCTURE |
FOR 140 | DF | WITH DISTINCT RADIALLY ACTING BIAS(277/138) {16} |
FOR 145 | DF | .~ With axially component (277/143) {1} |
FOR 146 | .~.~ Complementary inclined surfaces (277/144) {1} | |
FOR 147 | DF | .~.~.~> Transversely symmetrical (277/145) |