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