DIN EN 4550-1 (2015-03)被替代
Aerospace series - Pipe coupling, 37? - Design configuration - Inch series Part 1: Male sealing ends, spherical; German and English version EN 4550-1:2014
出版：German Institute for Standardisation (Deutsches Institut für Normung)
專家解讀視頻
UNI EN 4550-1:2016 - Identical
NF EN 4550-1:2015 - Identical
SN EN 4550-1:2015 - Identical
ONORM EN 4550-1:2004 - Identical
NS EN 4550-1:2014 - Identical
BS EN 4550-1:2014 - Identical
