gathering mine locomotive

例句：

1. 1.The engineers were gathering information about the new mining equipment.
   工程师们正在收集关于新采矿设备的信息。
2. 2. The mining company has been using this locomotive for decades.
   这个矿用火车头已经使用了几十年了。
3. 3.The mine manager was impressed by the efficiency of the locomotive in transporting heavy ore.
   矿长对这辆矿用火车头在运输重矿石时的效率印象深刻。