<https://www.hielscher.com/ultrasonic-processing-of-metal-melts.htm?preview#primaryimage>
<http://schema.org/caption>
"Dr. D. Andreeva demonstrates the procedure of ultrasonic structuring by using the UIP1000hd ultrasonicator (20 kHz, 1000W). Picture by Ch. Wißler"
<https://www.hielscher.com/fi/ultrasonic-processing-of-metal-melts.htm>