{TAIL ~ The transducer array} is mounted on a carriage assembly which moves back and forth on a pair of {HEAD ~ rails} inside a fluid compartment in the probe 
{ TAIL ~ The transducer array } is mounted on a carriage assembly which moves back and forth on a pair of { HEAD ~ rails } inside a fluid compartment in the probe
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH