(subclass MechanicalProcess NaturalProcess) | engineering.kif 638-638 | MechanicalProcess は NaturalProcess の subclass では %n |
(subclass Friction MechanicalProcess) | engineering.kif 646-646 | Friction は MechanicalProcess の subclass では %n |
(subclass MechanicalResonance MechanicalProcess) | engineering.kif 655-655 | MechanicalResonance は MechanicalProcess の subclass では %n |