Translation of "refractory" into Danish

It is therefore appropriate to establish a limit value for these refractory ceramic fibres.

Der bør derfor fastsættes en sådan grænseværdi for disse ildfast keramiske fibre.

Discussion of the specific advantages: disease sometimes refractory to treatment with pyrimethamine, and therefore an alternative is required.

Specifikke fordele: I nogle tilfælde er sygdommen ikke refraktær over for pyrimethaminbehandling, hvorfor der er behov for et alternativ