_RL exf_inscal_hl
& exf_inscal_hl,
I exf_inscal_hl,
I hl_period, exf_inscal_hl, hl_const,
& exf_inscal_aqh, exf_inscal_hs, exf_inscal_hl,
exf_inscal_hl = 1. _d 0