V to harden the surface of (steel or iron) by the addition of carbon at high temperature 使(钢或铁)表面硬化
On this basis, the contrast test of die lifetime was done, the reasonable die material and face-hardened technology were determined.
在此基础上，进行了模具寿命对比试验，确定了合理的模具选材和表面强化工艺。
Japanese Vickers Hardened (VH) face-hardened, non-cemented armor (used only on YAMATO-Class battleships)…Steel had many tiny pieces of dirt and so forth.
日制维克斯硬化型非渗碳（VH） 装甲（只用于大和级战列舰）…钢板上有很多细小的泥砂之类的东西。
His smile died and the look in his face hardened.
他的微笑消失了，脸上的表情突然显得严峻。
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