专用电极，特殊条件下使用，方便快捷精准。可订做红铜、钨铜、银钨螺纹电极。
技术参数：
| M*P | d | c | l | D | L |
| 2*0.4 | 1.4 | 10 | 7 | 5 | 100 |
| 2.5*0.45 | 1.8 | 10 | 7 | 5 | 100 |
| 3*0.5 | 2.2 | 15 | 10 | 5 | 100 |
| 4*0.7 | 2.9 | 17 | 12 | 5 | 100 |
| 5*0.8 | 3.9 | 20 | 15 | 5 | 100 |
| 6*1.0 | 4.7 | 23 | 18 | 6 | 100 |
| 8*1.25 | 6.1 | 30 | 24 | 8 | 100 |
| 10*1.5 | 7.9 | 36 | 30 | 10 | 100 |
| 12*1.75 | 9.6 | 42 | 36 | 12 | 100 |
| 16*2.0 | 13.6 | 42 | 40 | 16 | 100 |
| 20*2.5 | 17.1 | 42 | 40 | 20 | 100 |
