Hot steel is quenched to harden it.
烧热的钢放骤冷使之坚硬。
Hot steel is quenched to harden it.
烧热的钢放骤冷使之坚硬。
Some physico-chemistry properties of ultrafine zinc dust produced by the process of melting vapourizing shock-cooling of metallic zinc are measured.
采用金属锌加热熔化、蒸发、骤冷艺制备超细锌粉,对产品的部分化性能进行了测试。
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