I.S. EN 257:1992被替代
Mechanical Thermostats For Gas-burning Appliances
出版：National Standards Authority of Ireland
專家解讀視頻
Provides definitions for the terms used, classifies the mechanical thermostats which are the subject of the standard into two groupings defined by the bending moment each is required to withstand, and sets down comprehensive construction and performance requirements and test method.
UNE EN 257:1994 - Identical
SS EN 257 Ed. 1 (1992) - Identical
NS EN 257:1992 - Identical
UNI EN 257:1994 - Identical
NF EN 257:1992 - Identical
NBN EN 257:1992 - Identical
BS EN 257:1992 - Identical
DIN EN 257 (1996-08) - Identical
ONORM EN 257:1996 - Identical
NEN EN 257:1994 - Identical
SN EN 257:1997 - Identical
