Complex sentence: For the production or refinement of rare and refractory metals the vacuum furnaces are of smaller volume, but for steels, large furnaces with capacity measured in metric tons and electron beam power in megawatts exist in industrialized countries.
Split into simpler sentences: For the production or refinement of rare and refractory metals; the vacuum furnaces are of smaller volume. But for steels, large furnaces with capacity measured in metric tons and electron beam power in megawatts exist in industrialized countries.