fonte: https://www.farinapetra.it/0PDF/Effect%20of%20different%20milling%20methods.pdf
PETRA srl - via Roma 49 - 35040 Vighizzolo d'Este (PD) Italia IT03968430284
PETRA srl - Vighizzolo d'Este (PD) IT03968430284
PETRA srl - IT03968430284