sensor means for providing an output which varies as a function of said parameter, located distal to {HEAD ~ said bend} on {TAIL ~ said first segment}; and means for measuring the output of said sensor 
on
sensor means for providing an output which varies as a function of said parameter , located distal to { HEAD ~ said bend } on { TAIL ~ said first segment } ; and means for measuring the output of said sensor
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 TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH