On the eve of the Revolution, the colonies produced thirty thousand tons of crude iron a year.

独立战争前夕，北美十三州每年生产3万吨生铁。

柯林斯例句

Inside, coking , sintering and smelting plants churned out crude iron and steel.

在这道门里, 焦化和冶炼工厂源源不断地产出生铁和钢材.

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Scalding molten steel is in the crude iron ladle.

钢包里是滚烫的钢水.

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Pig iron : Crude iron obtained directly from the Blast furnace and cast in molds.

生铁: 从高炉直接炼得并在模中铸出的粗铁.

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