metal pencil

• 焊条

metal pencil的用法和样例：

例句

1. With the result the coating projects beyond the molten end of the electrode metal.
   结果药皮伸延于焊条金属芯熔端之外。
2. By adding magnesium powder into the coating of electrode,the sulphurs removal in deposited metal was satisfactory.
   通过理论分析及实验，探讨了手工电弧焊焊条药皮中添加金属镁粉的脱硫效果。