IEC TS 61994-4-1:2018 RLV

IEC TS 61994-4-1:2018 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition. IEC 61994-4-1:2018 gives the terms and definition for synthetic quartz crystals representing the state of the art, which are intended for manufacturing piezoelectric and optical elements. This edition includes the following significant technical changes with respect to the previous edition: - The new terms and definitions given in IEC 60758:2016 have been taken into account; - The general title has been changed according to the change in the title of TC 49 in 2009.