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1881 International Exhibition of Electricity in Paris: the installation was removed after that event. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ The trams had bipolar overhead lines, consisting of two U-pipes, in which the pantographs hung and ran like shuttles.<unk> The trams had bipolar overhead lines, consisting of two U-pipes, in which the pantographs hung and ran like shuttles. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️