In accordance with this invention, {HEAD ~ several polymerizations} may be run in {TAIL ~ a coated reactor} before having to recoat the surfaces thereof 
In accordance with this invention , { HEAD ~ several polymerizations } may be run in { TAIL ~ a coated reactor } before having to recoat the surfaces thereof
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH