In the FIG 4 embodiment, fluid coolant flow through cooling channel 46 removes {TAIL ~ heat} from {HEAD ~ heat exchanger} 40 
In the FIG 4 embodiment , fluid coolant flow through cooling channel 46 removes { TAIL ~ heat } from { HEAD ~ heat exchanger } 40
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 OTH