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Siemens open-hearth process is used in making:
Siemens open-hearth process is used in making:
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Solution
The correct option is D Steel
Siemens-Martin open-hearth process is a process for making steel in which streams of air and fuel gas were fed alternately onto the furnace contents. It was used to make most of the steel during the twentieth century but was then superseded by the basic oxygen and electric-arc methods.
Siemens-Martin open-hearth process is a process for making steel in which streams of air and fuel gas were fed alternately onto the furnace contents. It was used to make most of the steel during the twentieth century but was then superseded by the basic oxygen and electric-arc methods.
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