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