This means that {HEAD ~ the arrangement} can regulate {TAIL ~ any displacement volume} or displacement flow dynamically and continuously 
This means that { HEAD ~ the arrangement } can regulate { TAIL ~ any displacement volume } or displacement flow dynamically and continuously
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH