Second, the solution of {HEAD ~ polyethylene glycol} which has absorbed {TAIL ~ SOx} is regenerated by one or more of the heating, vacuum, ultrasonic, microwave or radiation methods, thereby releasing the by products of sulfur dioxide and sulfur trioxide 
Second , the solution of { HEAD ~ polyethylene glycol } which has absorbed { TAIL ~ SOx } is regenerated by one or more of the heating , vacuum , ultrasonic , microwave or radiation methods , thereby releasing the by products of sulfur dioxide and sulfur trioxide
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH 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 OTH OTH OTH OTH OTH