'(= (Counterweight_Weight ?X) (+ (Counterweight_Stack_Weight ?X) (Counterweight_System_Weight ?X)))
(<= (Has-Constraint $X Counterweight_Weight_C) (Elevator $X)) (Inherited-Slot-Value Elevator Has-Constraint Counterweight_Weight_C) (Used-In-Constraint Counterweight_Weight Counterweight_Weight_C) (Used-In-Constraint Counterweight_Stack_Weight Counterweight_Weight_C) (Used-In-Constraint Counterweight_System_Weight Counterweight_Weight_C)