'(=< (Car_Guiderail_Vertical_Force ?X) (Car_Guiderail_Vertical_Force_Maximum ?X))
(<= (Has-Constraint $X C-50) (Elevator $X)) (Inherited-Slot-Value Elevator Has-Constraint C-50) (Used-In-Constraint Car_Guiderail_Vertical_Force_Maximum C-50) (Used-In-Constraint Car_Guiderail_Vertical_Force C-50)