español term (edited): valores de resistencia de la red de tierras...

y la continuidad en los puntos de conexión a tierra
and the continuity of the ground connection points

An idea.
HTH
Good luck!

... values of ground resistances in ground network (i.e. in different mesh-points of contact to earth) & continuity in the contact points toward earth/ground

(this is the semantic meaning, I leave to you the "tweeking" of the phrase for what concerns syntax, as appropriate to your previous sentence)

Hope this helps, bye