Conversely, {TAIL ~ each transformer} 28 also serves to transmit signals from {HEAD ~ the corresponding tool} 12 1 to 12 4 to the surface installation 16 
Conversely , { TAIL ~ each transformer } 28 also serves to transmit signals from { HEAD ~ the corresponding tool } 12 1 to 12 4 to the surface installation 16
OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH