uncoated electrode

例句：

1. 1. The uncoated steel is stronger than the coated one.
   未涂层的钢材比涂漆的更坚固。
2. 2.The paint on the wall was uncoated, so it would peel off easily.
   墙上的油漆是未涂层的，所以很容易脱落。
3. 3. The car was uncoated, so it didn't need any special treatment.
   这辆车是未涂层的，所以不需要任何特殊处理。