IEC <br/><br/>
IEC: 60079-1-1-2002-07; Electrical Apparatus for Explosive Gas Atmosphere- Part 1-1: Flameproof enclosures "d"- Method of test for ascertainment of maximum experimental safe 

 - 1 
 - Geneva  IEC  2002 
 - 19 
<br/><br/><label>Universal Decimal Class. No.: </label> /