Three single-phase transformers are provided, the primary sides connected in a Wye configuration. to remove the protecting groups of the hydroxy group of the polyhydric alcohol compound. The withdrawer includes a case, a combination lock and a push rod. The bias voltage allows for compensation for the process, voltage and temperature variations. Some embodiments may remodel subcutaneous adipose tissue so as to alter a shape or appearance of the skin surface. The suction blowmold according to the present invention is characterized in that at least a part of the mold surface of the cavity has a structuring which provides a reduced sliding friction to the preform.