This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Quartz crystal piezoelectric plate.svg pl Gwna cz krysztau kwarcu zaznaczonymi osiami krystalograficznymi oraz wycita niego pytka piezoelektryczna ciciu ciciu Curie On the basis of the picture from Goniki piezoelektryczne Radioelektronik ss sierpie ISSN CLI Piezoelectricity Quartz rdo On the basis of the picture from Goniki