It is particularly applicable to {HEAD ~ the operation} of loop reactors which produce {TAIL ~ polyethylene} or polypropylene where withdrawal of reaction slurry is continuously controlled by manipulating a v notch ball valve 
It is particularly applicable to { HEAD ~ the operation } of loop reactors which produce { TAIL ~ polyethylene } or polypropylene where withdrawal of reaction slurry is continuously controlled by manipulating a v notch ball valve
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH 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