Fibre optic active components and devices - Reliability standards -- Part 3: Laser modules used for telecommunication (IEC 62572-3:2016) (english version)
Fibre optic active components and devices - Reliability standards - Part 3: Laser modules used for telecommunication (IEC 62572-3:2014) (english version)
Heating systems in buildings - Method for calculation of system energy requirements and system efficiencies - Part 3-3: Domestic hot water systems, generation; German version EN 15316-3-3:2007— 34 стр.
Fibre optic active components and devices - Reliability standards - Part 3: Laser modules used for telecommunication (IEC 62572-3:2014) (english version)