| Name | Lens cone electrode testing piece |
| Material | Copper |
| Machine | JDHGT400_A8 |
| Size | 82×37×12mm |
| Advantages | 1、Precision of the center distance is ±0.002mm; 2、Dimensional accuracy is ±0.005mm; 3、There is no wire drawing on the conical surface under 40 times magnifier. |