常見例句雙語例句Due to their low carbon content, these steels cannot be hardened except by case hardening.由於它含有較少的碳，這些鋼不能被硬化，衹能進行表麪硬化。This hardness ranges from 900 to 1,100 Brinell, which is considerably higher than that obtained by ordinary case hardening.其硬度範圍爲900 到1，100 佈氏硬度，這遠高於普通表麪硬化所獲得的硬度。This impervious layer or boundary will retard the free diffusion of moisture. This condition is referred to as case hardening.這一不透氣的殼層(或邊界層)會阻滯水分自由擴散，這種情 形稱爲表麪硬化。 返回 case hardening