carburated case depth

例句：

1. 1. The carburated case depth is measured by theamount of carbon dioxide produced during combustion.
   燃烧产生的二氧化碳量用于测量燃烧深度。
2. 2. The carburated steel has ahigh strength and toughness.
   这种含碳钢具有很高的强度和韧性。
3. 3. The carburated surface of the metal is smooth andshiny.
   金属表面的碳化层光滑且有光泽。