decarburized zone

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Chinese industrialization — In the 1960s, about 60% of the Chinese labor force were employed in agriculture. The figure remained more or less constant throughout the early phase of industrialization between the 1960s and 1990s, but in view of the rapid population growth… … Wikipedia
History of ferrous metallurgy — Iron (material) redirects here. For the chemical element Fe, see Iron. Bloomery smelting during the Middle Ages. The history of ferrous metallurgy began far back in prehistory. The earliest surviving iron artifacts, from the 5th millennium BC in… … Wikipedia

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