蒸汽挖土机

例句：

1. 1. The steam engine excavator is used for deep mining.
   蒸汽发动机挖掘机用于深矿开采。
2. 2. The excavator has a powerful motor and can dig up soil with ease.
   挖掘机拥有强大的马达，可以轻松挖掘土壤。
3. 3. The excavator is an essential tool in construction work.
   挖掘机是建筑工作中必不可少的工具。