include file: RV 2
*IF DEF,A05_2A,OR,DEF,A05_2C,OR,DEF,A05_3B,OR,DEF,A05_3C                   AJX1F405.146    
      REAL RV  !  GAS CONSTANT FOR WATER VAPOUR (J/KG/K)                   RV.3      
      PARAMETER ( RV = 461.1 )                                             RV.4      
C                                                                          RV.5      
*ENDIF                                                                     RV.6