Method and apparatus for monitoring {HEAD ~ the surface contact} of {TAIL ~ a neutral electrode} of a HF surgical apparatus 
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Method and apparatus for monitoring { HEAD ~ the surface contact } of { TAIL ~ a neutral electrode } of a HF surgical apparatus
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH