Such an arrangement may well be suitable for measuring pipe to soil potentials of a cathodic protection system for pipelines wherein {HEAD ~ access} to {TAIL ~ the soil} in the vicinity of the pipeline at selected points of measurement is not practical 
to
Such an arrangement may well be suitable for measuring pipe to soil potentials of a cathodic protection system for pipelines wherein { HEAD ~ access } to { TAIL ~ the soil } in the vicinity of the pipeline at selected points of measurement is not practical
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH