B?m ??ng Hoá ??n T?ng B?m ??ng Hoá ?a T?ng B?m tr?n th?c ph?m Thi?t b? th?c ph?m khácB?m ph?i ch?u ???c s? thay ??i liên t?c c?a nhi?t ?? t? l?nh sang nóng và ng??c l?iIn the situation of methanol and ethanol, the methanol incorporates a reduce boiling place and can be gathered before the ethanol. This method is then repeated again and again