"Metal·lografia" . . "Hierro Tratamiento térmico." . . "Steel Thermotherapy." . . "Acier Métallographie." . . "Fer Métallographie." . . "Steel." . . "Métallographie." . . . . . . . "The Metallography and Heat Treatment of Iron and Steel" . . . "The metallography & heat treatment of iron & steel"@en . . . . . . . . . . . . . . "The metallography of iron and steel"@en . "The metallography of iron and steel" . . . . . . . . . . . . "The Metallography and heat treatment of iron and steel" . . "The metallography and Heat Treatment of Iron and Steel" . . . . . . . . . . . . . . . . . . . . "The metallography and heat treatment of iron and steel"@en . "The metallography and heat treatment of iron and steel" . . . . . . . . . . . . . "Metallography of iron and steel"@en . . . . . . . . . . . . . . . . . . . . . . "The Metallography of iron and steel" . . . . "Iron." . . . . "Metalografía." . . "Metallography." . . "Acer" . . "Acer." . "Acero Tratamiento térmico." . . "Steel Metallography." . . "Iron Metallography." . . "Tratamentos Termicos." . . "Ferro." . .