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