'(= (Sling_Weight ?X) (+ (* (Sling_Weight_Factor_A (Elevator.Sling ?X)) (Platform_Width_F (Elevator.Platform ?X))) (+ (* (Sling_Weight_Factor_B (Elevator.Sling ?X)) (Sling_Stile_Length ?X)) (Sling_Weight_Factor_C (Elevator.Sling ?X)))))
(<= (Has-Constraint $X Sling_Weight_C) (Elevator $X)) (Inherited-Slot-Value Elevator Has-Constraint Sling_Weight_C) (Used-In-Constraint Platform_Width_F Sling_Weight_C) (Used-In-Constraint Sling_Weight_Factor_A Sling_Weight_C) (Used-In-Constraint Sling_Weight_Factor_B Sling_Weight_C) (Used-In-Constraint Sling_Weight_Factor_C Sling_Weight_C) (Used-In-Constraint Sling_Weight Sling_Weight_C) (Used-In-Constraint Sling_Stile_Length Sling_Weight_C)