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Term 1: Term 2:

(subclass MechanicalProcess NaturalProcess) engineering.kif 637-637 Mechanical process is a subclass of natural process
(subclass Friction MechanicalProcess) engineering.kif 645-645 Friction is a subclass of mechanical process
(subclass MechanicalResonance MechanicalProcess) engineering.kif 654-654 Mechanical resonance is a subclass of mechanical process


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