negative polarity welding

例句：

1. 1. In negative polarity welding, the current flows in opposite directions to the magnetic field.
   在负极性焊接中，电流与磁场方向相反。
2. 2. The negative polarity welding process involves using a special electrode that creates a strong electric field around the workpiece.
   负极性焊接过程涉及使用一种特殊的电极，在工件周围产生强电场。
3. 3. Negative polarity welding is commonly used in high-speed manufacturing processes to improve productivity and reduce defects.
   负极性焊接常用于高速制造过程中，以提高生产效率并减少缺陷。