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