HD 478.2.4:1989现行
Classification Of Environmental Conditions - Environmental Conditions Appearing In Nature - Solar Radiation And Temperature
出版：Harmonization Documents
专家解读视频
S1 [05/12/1989]
UNE 20675-2-4:1993 - Identical
SS EN 60721:1997 - Identical
DS IEC 60721-2-4:1988 - Identical
CEI 75-6 Ed. 1 (1997) - Identical
NEN 10721-2-4:1989 - Identical
DIN IEC 60721-2-4 (1990-06) - Identical
IEC 60721-2-4 Ed. 1.1 - Identical
NFC 20 000:1990 - Identical
PN 90/E-04555.24:1990 - Identical
SS IEC 60721-2-4 Ed. 1 (2001) - Identical
