These compositions may also be reused, i.e., used for more than one purging operation, and they may be recycled by incorporating the used purge composition into {HEAD ~ a polymer} which is identical to or compatible with the polymer of {TAIL ~ the purge composition} 
These compositions may also be reused , i.e. , used for more than one purging operation , and they may be recycled by incorporating the used purge composition into { HEAD ~ a polymer } which is identical to or compatible with the polymer of { TAIL ~ the purge composition }
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 HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL