Modern aqueduct systems employ cast iron or steel.

现代输水管道多用钢、铁制成。

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Sanitary ware and parts thereof, of iron or steel.

钢铁制卫生器具及其零件。

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Iron or steel, 800 million tons, almost a billion tons of steel.

铁或钢，每年8亿吨，几乎接近10亿的钢产量。

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Iron or steel, 800 million tons, almost a billion tons of steel.

铁或钢，每年8亿吨，几乎接近10亿的钢产量。

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Producing one tonne of paper requires the same amount of energy as iron or steel.

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Tiny amounts of metal found in frozen drinks machines were similar to those found in food cooked in cast iron or stainless steel pans, according to independent lab tests, and posed no health risk, the firm added.

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These do not quite fall into the category of entertainment, but they too depend more on human talent and ingenuity than on pig iron, steel mills or production lines and the Midwest has a good supply of them.

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