{HEAD ~ at least one snubber capacitor} connected in {TAIL ~ series} with the thyristor circuit diode in parallel with the respective gate turn off thyristor, and 
connected in
{ HEAD ~ at least one snubber capacitor } connected in { TAIL ~ series } with the thyristor circuit diode in parallel with the respective gate turn off thyristor , and
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH