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A transformation of a circuit containing voltage-controlled current sources is investigated. By the transformation a node is eliminated. Transformation formulas are derived, and a condition and a procedure for inverse transformation are given. Then the transformation is applied to element-value calculation. The inaccessible nodes in a network are eliminated one by one by the transformation and a sequence of networks , and are obtained, where is the original network and is the final network which contains accessible nodes only and whose element-values or parameter-values can be determined from measurements. The backward process involves revival of inaccessible nodes one by one, and the procedure for inverse transformation is applied to determine, if possible, the element-values in from those in , those in from those in and so on until those in calculated.