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Pendulum equal to richter to electrical measuring with a vibrating, elastic spring, additional elastic transmission members, and a polarized solenoid, the coil of a phase-shifted alternating current of the same frequency as that of the current flowing through it to be rectified and in the field oscillates the spring
Pendulum equal to richter to electrical measuring with a vibrating, elastic spring, additional elastic transmission members, and a polarized solenoid, the coil of a phase-shifted alternating current of the same frequency as that of the current flowing through it to be rectified and in the field oscillates the spring
