HD 478.2.1:1989被替代
Classification Of Environmental Conditions - Environmental Conditions Appearing In Nature - Temperature And Humidity
出版：Harmonization Documents
专家解读视频
S1 [05/12/1989]
DS IEC 60721-2-1:1987 - Identical
CEI 75-2 Ed. 1 (1997) - Identical
NEN 10721-2-1:1988 - Identical
IEC 60721-2-1 Ed. 1.1 - Identical
BS 7527-2.1:1991 - Equivalent
NFC 20 000:1990 - Identical
SS IEC 60721-2-1 Ed. 1 (2001) - Identical
SS EN 60721:1997 - Identical
UNE 20675-2-1:1993 - Identical
