1.Single NiCr-NiSi WRN-320
2.Double NiCr-NiSi WRN2-320
3. Single NiCr-CuNi WRE-320
4. Double NiCr-CuNi WRE2-320
5. Single NiCr-NiSi WRN-330
6. Single NiCr-NiSi WRN2-330
7.Single nickel-chrome-copper nickel WRE-330
8. Double NiCr-CuNi WRE2-330 TAG：