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The universal voltmeter "B7-15" from I quarter of 1976 produced Krasnodar spare parts. Universal voltmeter "B7-15" is designed to measure DC voltage, effective values "‹"‹of alternating voltage of sinosuidal form, as well as active resistance. To expand the capabilities of the device, there are dividers and adapters included. The voltmeter has another name "VK7-15".