IEC网站近期发布的标准No.3/2004—2

IEc标准编号和名称IEC 60079一7 Ed.3.0(2004一02)Corrigenduml:Eleetrieal aPParatus for exPlosive gas atmosPheres一Part7:Inereased safety“e,,ICS eode:29.260.20 TC 31 1 Page第1次修改:爆炸性气体环境用电气设备第7部分:增安型电气设备‘,e’,。第3 .0版IEC 60896一21 Ed.1.0(2004一02)Stationary lead一aeid batterles一Part 21:Valve regulated tyPes一Methods of