A lubricating oil composition includes an antibacterial composition, a corrosion preventive, petroleum naphtha, optionally a solvent, and the balance being an oil. The tubular wall is produced from a plane blank, the end regions of which are joined together in an overlap region. The core has a diameter of from about 1. Connected to the gas discharge passage at a position upstream of the heat exchanger is a temperature-lowering gas introduction unit for introducing a temperature-lowering gas to the cooling gas of a raised temperature so as to lower its temperature. The coating protects the wires from harmful contact with an electrolyte inside the cell. The externally connecting electrode has a pad metal layer whose upper surface is exposed, a first metal layer formed between the pad metal layer and the semiconductor substrate, and at least two first vias which penetrate the interlayer insulation film and electrically connect the pad metal layer to the first metal layer and are formed in the interlayer insulation film.