{HEAD ~ The present invention} pertains to {TAIL ~ a method} and apparatus for improving contact between a liquid and a gas, either or both of which may be a reactant 
pertains to
{ HEAD ~ The present invention } pertains to { TAIL ~ a method } and apparatus for improving contact between a liquid and a gas , either or both of which may be a reactant
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH