A method, device, and {TAIL ~ system} for controlling a flow of a fluid moving through {HEAD ~ a pipe} are presented 
A method , device , and { TAIL ~ system } for controlling a flow of a fluid moving through { HEAD ~ a pipe } are presented
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH