নিৰ্বাতনিৰ্বাত বাষ্পীভৱন
নিৰ্বাত পাতন (Assamese)
1. ChemistryVacuum distillation or distillation under reduced pressure is a type of distillation performed under reduced pressure, which allows the purification of compounds not readily distilled at ambient pressures... from wikipedia.org