{HEAD ~ An arrangement} for the remote actuation of a controlled device, e.g. a hydraulic valve, in situations with stringent safety requirements, uses {TAIL ~ optical power} 
uses
{ HEAD ~ An arrangement } for the remote actuation of a controlled device , e.g. a hydraulic valve , in situations with stringent safety requirements , uses { TAIL ~ optical power }
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL