The second current to pressure converter is disposed in {HEAD ~ pneumatic signal transmitting relation} to {TAIL ~ the controllable depressurizing valve} means 
to
The second current to pressure converter is disposed in { HEAD ~ pneumatic signal transmitting relation } to { TAIL ~ the controllable depressurizing valve } means
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH