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the total pressure absorption with a flow of air of density 1 72 kg/m3 at a flow rate equal to qmax must not exceed on average:
strata celkového tlaku s prietokom vzduchu o hustote 1,2 kg/m3 pri prietoku rovnajúcom sa qmax nesmie v priemere presiahnuť:
during each test, the relative variation in the flowrates must not exceed 2 75 % between qmin and qt and 5 % between qt and qmax.
počas každej skúšky relatívne výkyvy v prietoku nesmú byť väčšie ako 2,5 % medzi qmin a qt a 5 % medzi qt a qmax.