International Electrotechnical Commission <br/><br/>
IEC: 60099-4-2009 Amendment 2; Surge arresters part 4: Metal-oxide surge arresters without gaps for a.c. systems 

 - 2.0 
 - Geneva  International Electrotechnical Commission  2009 
 - 26 
<br/><br/> Downloaded from IEC website 
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