BS EN 60721-3-4:1995現行
Classification of environmental conditions. Classification of groups of environmental parameters and their severities. Stationary use at non-weatherprotected locations
出版：British Standards Institution
專家解讀視頻
Classifies severities to which a product may be exposed under its use conditions, including periods of erection work, downtime, maintenence and repair.
? British Standards Institution 2013
Amendment notes:
AMD 9513 published 15 June 1997
UNE EN 60721-3-4:1997 - Identical
SS EN 60721-3-4:2001 - Identical
I.S. EN 60721-3-4:1997 - Identical
IEC 60721-3-4 Ed. 2.0 - Identical
HD 478.3.4:1989 - Equivalent
DIN EN 60721-3-4 (1995-09) - Identical
SN EN 60721-3-4:1995 - Identical
EN 60721-3-4 : 1995 AMD 1 1997 - Identical
DIN EN 60721-3-4 : 1995 - Identical
I.S. EN 60721-3-4:1997 - Identical
DIN EN 60721-3-4 : 1995 - Identical
UNE EN 60721-3-4 : 1997 - Identical
UNE EN 60721-3-4 : 1997 - Identical
SN EN 60721-3-4 : 1995 AMD 1 1997 - Identical
I.S. EN 60721-3-4:1997 - Identical
