BS EN 60721-3-9:1993現行
Classification of environmental conditions. Classification of groups of environmental parameters and their severities. Microclimates inside products
出版：British Standards Institution
專家解讀視頻
Defines classes of microclimatic conditions when the product is being used under climatic conditions classified in BS EN 60721-3-3 or 60721-3-4.
? British Standards Institution 2013
Amendment notes:
AMD 8954 published 15 December 1995
SN EN 60721-3-9:1993 - Identical
DIN EN 60721-3-9 (1995-08) - Identical
IEC 60721-3-9 Ed. 1.0 - Identical
I.S. EN 60721-3-9:1994 - Identical
SS EN 60721-3-9:2001 - Identical
UNE EN 60721-3-9:1996 - Identical
