welding generator with differential excitation

例句：

1. 1. The welding generatoris essential for the construction of large bridges.
   焊接发电机对于建造大型桥梁至关重要。
2. 2.The welding generator was used toheat up the metal parts before they werejoined together.
   焊接发电机被用来加热金属部件，以便在它们被连接在一起之前进行热合。
3. 3. The weldinggenerator is a powerful tool that can beused to create intricate designs on metal surfaces.
   焊接发电机是一种强大的工具，可以用来在金属表面上创建复杂的设计。