{HEAD ~ Removal methods} include heating and rectification, absorption using a water absorbent, or {TAIL ~ a combination} of these methods 
include
{ HEAD ~ Removal methods } include heating and rectification , absorption using a water absorbent , or { TAIL ~ a combination } of these methods
HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH