6. Single nickel-chrome-copper-nickel WRE-220A
7. Double NiCr-CuNi WRE2-220
8. Double NiCr-CuNi WRE2-220A
9. Single NiCr-NiSi WRN-230
10. Double NiCr-NiSi WRN2-230
11. Single nickel-chrome-copper nickel WRE-230
12. Double NiCr-CuNi WRE2-230
TAG：