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Description: Cast iron mercury interrupter, motor in spherical casing, cylindrical vessel for mercury, with taps for coal gas, made by Watson, London English, 1900-1925 License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: interrupters Temporal: 1900-1925 Source: Science Museum Identifier: A231182 Go to resource More Like this...
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