The present invention relates to a process for producing sugar from beets, comprising the steps of: macerating beets or pieces thereof; mechanically separating juice from the macerated beets; and membrane filtering the separated juice, producing a retentate and a permeate. The order includes a plurality of inputs relating to a delivery address and a customer-specified color and quantity of liquid coating. The level of the sensed voltage is double regulated, thereby improving the amplification degree on low voltage sensing data, and a small sensing voltage of a main bit line can be embodied, thereby embodying a lower voltage memory.