The basic principle of hydropower is to use the water level drop to cooperate with the hydro generator to generate electricity, that is, to convert the potential energy of water into the mechanical energy of the hydro turbine, and then use the mechanical energy to drive the generator to obtain electricity.

1. Lightning protection of electromagnetic flowmeter
Whether as a sedimentation meter or an electromagnetic flowmeter for regional measurement, the electromagnetic flowmeter has become a relatively severe test in the relatively open suburbs, especially in the coverage of large thunderstorms in Guangdong.