{HEAD ~ Each transducer port} 850 defines an aperture 858 for receiving the transducer structure 740, and further comprises a counter bore 855 for receiving the flange portion 715 of the header 710 of {TAIL ~ the transducer structure} 740 
{ HEAD ~ Each transducer port } 850 defines an aperture 858 for receiving the transducer structure 740 , and further comprises a counter bore 855 for receiving the flange portion 715 of the header 710 of { TAIL ~ the transducer structure } 740
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH