This invention provides a cell frame for a redox flow battery that prevents leakage of electrolyte out of the cell frame and also provides a good workability in assembling the redox flow battery. In the preferred embodiments, the wavelet transforms are be used in either the transmissioncoding or receptiondecoding phase for enabling a more efficient conversion of the signal and providing a more robust and accurate output. An aqueous alkaline washing liquid is used in the hydrogen sulfide removal step and with the spent sulfide containing washing liquid being regenerated using an oxidation bioreactor that utilizes sulfide oxidizing bacteria such as autotropic aerobic cultures of Thiobacillus and Thiomicrospira. A dial cap is attached to the rotary operation member such as to close an opening face of the receiving recess of the rotary operation member, whereby the receiving recess is tightly closed by the dial base and the dial cap. The other conductor is made of a metal wire material and formed into a cylindrical shape by spirally winding the metal wire material, and portions of the metal wire material positioned to be adjacent to each other contact with each other at side end faces opposed to each other. In prior art circuit, a dual-ladder DAC is employed for gain control, the back gate leakage of NMOS resistors in the fine ladder conquers fine ladder nominal current and it produces non-monotonic gain scallop.