The product is special manual transformer which is connected in differentforms. lts output voltage can be regulated smoothly and
continuously from zero to the maximum voltage. The provision of an indicating meter is made for all models. All models find popular
application in industries, agriculture and scientific researches, and are particularly suited to serve as ancillary facilities for such
equipment as various machine tools, transistorcurve tracers, projecting TVsets, and instruments in petroleum industry, etc.