坩埚钢

例句：

1. 1.The steel was made from the moltenmetal in a crucible, whichis called a 'cave-in'.
   这种钢是用熔融金属在坩埚中制成的，被称为“坩埚”。
2. 2. The steel industry relies heavily on theuse of high-quality iron oreto produce this type of steel.
   钢铁工业严重依赖高质量铁矿石的使用来生产这种类型的钢材。
3. 3. The steel was used for buildingbridges and other structures due to itsstrength and durability.
   由于其强度和耐用性，这种钢材被用于建造桥梁和其他结构。