translate English to French: There have traditionally been two groups: those who supply equipment, and those who supply consumable materials, whether scrap, sand, filters, or chemicals, and these two groups were consistently identified as the principal source of new technologies.
Il existait traditionnellement deux groupes, celui qui fournit le matériel et celui qui fournit des matériaux consommables (ferrailles, sable, filtres ou produits chimiques). Ces deux groupes ont été toujours considérés comme la principale source de nouvelles technologies.