Processing aids to improve the bitumen recovery and froth {HEAD ~ quality} in {TAIL ~ oil sands} extraction processes 
Processing aids to improve the bitumen recovery and froth { HEAD ~ quality } in { TAIL ~ oil sands } extraction processes
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH