As a practical matter, the transducer 48 comprises {HEAD ~ a differential transducer} commercially available from {TAIL ~ Kulite Semi Conductor Products}, Inc. of Richfield, New Jersey 
commercially available from
As a practical matter , the transducer 48 comprises { HEAD ~ a differential transducer } commercially available from { TAIL ~ Kulite Semi Conductor Products } , Inc. of Richfield , New Jersey
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH