Grounding hardware accessories: Ningbo times Sudagongsi professional production of ground parts, wire and cable, wire and ground rod connection. For a variety of oil depots and other not-sparking lightning ground network engineering. Model specification is complete, it can be customized. Earth observation wells: Ningbo times Sudagongsi professional production of Earth observation wells, complete model specifications. Earth observation wells is mainly used for regular observation and measurement of ground resistance. Resistance measurements, remove the wire grounding conductor to the covers and resistance measuring instrument.