(<= (Has-Parameter-Slot $X Counterweight_Buffer_Blocking_Height) (Elevator $X)) (Inherited-Slot-Value Elevator Has-Parameter-Slot Counterweight_Buffer_Blocking_Height) (Inherited-Facet-Value Slot-Value-Type Elevator Counterweight_Buffer_Blocking_Height Real-Number) (Inherited-Facet-Value Slot-Cardinality Elevator Counterweight_Buffer_Blocking_Height 1)