A liquid conductive composition for electrolytic use, comprises a cobalt salt, a zinc salt, a polar aprotic solvent of said salts and a cobalt ligand. In one aspect, the identity of a hardware device capable of communicating with computer systems is automatically determined. The separate external housing covers the core part to prevent environmental moisture from entering the inside of the communication apparatus through the seam. The mixing valve controllably receives at least some of the first temperature fluid and some of the second temperature fluid discharged from the primary heat exchanger and mixes the respective fluids to produce a third temperature fluid. The leg pole pipe is inserted into the side pole pipe or the leg pole pipe and the side pole pipe cross each other to move both pipes up and down. The video encoder may incorporate control information in the output bitstream to control deblock filtering in the downstream decoder to maintain consistency between the encoder and the decoder.