Reduced cost was also instrumental in developingsteam-powered rolling mills capable of producing finished iron of various shapes and sizes.
降低的成本也有助于那些能够生产不同形状和尺寸的成品铁制品的蒸汽动力轧钢厂的发展。
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And Andrew Kindler at the California Institute of Technology in Pasadena is developing a way for cars to generate hydrogen on board by reacting magnesium fuel with steam.