English to Italian Tech/Engineering Mechanics / Mech Engineering

si tratta di un metodo per la valutazione delle dimensioni di particelle e polveri.

"The products were then pulverized using a hammer mill with liquid nitrogen fed slowly into the grinding chamber. Classification on an Alpine sieve afforded powders with particle sizes of 105 microns or less"

Qualcuno sa il corrispondente italiano?

Grazie,
Carla