DIN IEC 75(CO)81
													
												
												 
													
														Classification of environmental conditions; 2nd draft amendment no. 2 to IEC 721; part 3: classification of groups of environmental parameters and their severities; sections 1, 2, 3, 4 and 7: regarding sets of environmental condition class combinations (IEC 75(Central Office)81:1992)
														
													
												
												
												 	
														
														
														
															废止
														
														
														
													
												
												
													
													
													发布日期 : 
														2001-01-01
														
													
													实施日期 : 
														
													
											
										
												 
													
														
														DIN IEC 75(Sec)150
													
												
												 
													
														Electrical engineering; classification of environmental conditions; IEC 60721-3-Y: classification of groups of environmental parameters and their severities; stationary use at enclosed locations during fire exposure; identical with IEC 75(Secretariat)150
														
													
												
												
												 	
														
														
														
															废止
														
														
														
													
												
												
													
													
													发布日期 : 
														2001-11-01
														
													
													实施日期 : 
														
													
											
										
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