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Changes
→Silver–Tungsten (SIWODUR) Materials
of this material group ''(Figs. 2.134 and 2.135) (Table 2.37)''.
[[File:Contact and Switching Properties of Contact Materials Based on.jpg|right|thumb|Contact and Switching Properties of Contact Materials Based onSilver – Tungsten (SIWODUR), Silver–Tungsten Carbide (SIWODUR C) and Silver Molybdenum (SILMODUR)]]
During repeated switching under arcing loads tungsten oxides and mixed