This invention relates to {HEAD ~ packed tower} or packed column structures used for {TAIL ~ intimate contact} between a gas and a liquid to effect mass transfer therebetween 
used for
This invention relates to { HEAD ~ packed tower } or packed column structures used for { TAIL ~ intimate contact } between a gas and a liquid to effect mass transfer therebetween
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH