{HEAD ~ Each} of the plurality of transducer ports can define an aperture and a counter bore, wherein each transducer is positionable in an associated transducer port with the flange of the header of {TAIL ~ the transducer} being welded to the counter bore of the transducer port 
{ HEAD ~ Each } of the plurality of transducer ports can define an aperture and a counter bore , wherein each transducer is positionable in an associated transducer port with the flange of the header of { TAIL ~ the transducer } being welded to the counter bore of the transducer port
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 OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH