(subclass Source PureTwopole) | engineering.kif 520-520 | Source e' uma sub-classe de PureTwopole |
(subclass AcrossVariableSource Source) | engineering.kif 524-524 | AcrossVariableSource e' uma sub-classe de Source |
(subclass ThroughVariableSource Source) | engineering.kif 528-528 | ThroughVariableSource e' uma sub-classe de Source |