BS EN 257:1992被替代
Mechanical thermostats for gas-burning appliances
出版：British Standards Institution
专家解读视频
Requirements for construction, performance and marking, and methods of test for mechanical thermostats, which do not require external electrical energy, for use in gas burning appliances.
© British Standards Institution 2013
Amendment notes:
AMD 9303 published 15 January 1997
SN EN 257:1997 - Identical
NEN EN 257:1994 - Identical
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
I.S. EN 257:1992 - Identical
NBN EN 257:1992 - Identical
DIN EN 257 (1996-08) - Identical
ONORM EN 257:1996 - Identical
