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 temiz?mdan kaynaklan?r. Belli kristaller, kuartzlar ve hatta ?eker da d?? bask?ya verilen kalm?? oldu?unda, yüzleri ortada fark olu?turur. Piezoelektrik, 1880 y?l?nd