| 74 / | HD | MACHINE ELEMENT OR MECHANISM |
| 640 | DF | GEARING {31} |
| 665 R | DF | .~ Plural power paths to and/or from gearing {10} |
| 665 A | ![]() | .~.~ Single driven plural drives {4} |
| 665 B | DF | .~.~.~> Parallel |
| 665 C | DF | .~.~.~> Nonparallel |
| 665 D | DF | .~.~.~> Aligned |
| 665 E | DF | .~.~.~> Parallel and aligned |