Apparatus and {HEAD ~ method} for improving the efficiency of internal combustion engines and {TAIL ~ fluid pumping devices} 
Apparatus and { HEAD ~ method } for improving the efficiency of internal combustion engines and { TAIL ~ fluid pumping devices }
OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL