钢铁工业结构优化是降低钢比系数，进而降低吨钢能耗的根本途径。
The structure optimization is ultimate approach to decreasing are and hot metal to steel ratio and energy consumption per ton crude steel.
由于铜的膨胀系数特别高，铜在加热时比钢膨胀得多。
Copper, with its extremely high coefficient of expansion, expands more during heating than steel does.
由于铜的膨胀系数特别高，铜在加热时比钢膨胀得多。
Copper, with its extremely high coefficient of expansion, expands more during heating than steel does.
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