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