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DIN ETS 300103
Integrated Services Digital Network (ISDN); support of CCITT recommendation X.21, X.21bis and X.20bis based Data Terminal Equipments (DTEs) by an ISDN; synchronous and asynchronous terminal adaption functions; english version ETS 300103:1990
Edition
1992-02
DIN ISO 9039
Optics and photonics - Quality evaluation of optical systems - Determination of distortion (ISO 9039:2008)
Edition
2008-08
Surface texture
Theory and practical use
Edition
2020-06