welding tractor

例句：

1. 1. The welding tractor is used for heavy-duty construction work.
   焊接拖拉机用于重型建筑工作。
2. 2. The welding tractor has a powerful engine and can handleheavy loads.
   焊接拖拉机拥有强大的引擎，可以处理重负载。
3. 3. The weldingtractor is essential for the construction industry.
   焊接拖拉机对于建筑业至关重要。