{HEAD ~ The reducing agent} is pumped out of a reactant reservoir and to {TAIL ~ a dosing valve} so that after the dosing valve is opened, the reducing agent can be introduced into the engines exhaust gas line in a dosed manner 
is pumped to
{ HEAD ~ The reducing agent } is pumped out of a reactant reservoir and to { TAIL ~ a dosing valve } so that after the dosing valve is opened , the reducing agent can be introduced into the engines exhaust gas line in a dosed manner
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH