(subclass MechanicalProcess NaturalProcess) | engineering.kif 638-638 | Mechanical process is a subclass of natural process |
(subclass Friction MechanicalProcess) | engineering.kif 646-646 | Friction is a subclass of mechanical process |
(subclass MechanicalResonance MechanicalProcess) | engineering.kif 655-655 | Mechanical resonance is a subclass of mechanical process |