_RL exf_inscal_apco2
& exf_inscal_apco2,
I exf_inscal_apco2,
I apco2period, exf_inscal_apco2, apco2const,
& exf_inscal_apco2, exf_outscal_apco2, apco2const,
exf_inscal_apco2 = 1. _d 0