<prompt> Translate the following text to SwahiliSCR catalyst is a critical part of the SCR system that is manufactured on a worldwide basis by some of the largest companies in the world.  <response>: SCR catalyst ni sehemu muhimu ya mfumo wa SCR ambayo hutengenezwa ulimwenguni kote na baadhi ya makampuni makubwa zaidi ulimwenguni. 