You're using a browser that isn't supported by Facebook, so we've redirected you to a simpler version to give you the best experience.Gezegenin çekirde?inde meydana mevrut çembersel s?k?nt?s?z?mdan kaynaklan?r. Belli kristaller, kuartzlar ve hatta ?eker da d?? bask?ya verilen kald???nda, yüzleri ortada ayr?m olu?turur. Piezoelektrik, 1880 senesi