From the Liénard–Wiechert potential in both the gravitational field and the electromagnetic field,it is shown that the propagation speed of gravitational field(waves)can be tested by comparing the measured speed of gravitational force with the measured speed of Coulomb force.
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机译：sea noise vs. near and distant wave height and wind speed : correlation of measurements made in deep, open-ocean areas of the northeast pacific / W.L. Frisch.
