{HEAD ~ The process} 1 wherein said {TAIL ~ hydrocarbons} are acetylene, ethylene, propylene, propane, n butane, iso butane, the n butylene isomers and the various iso butylene isomers 
{ HEAD ~ The process } 1 wherein said { TAIL ~ hydrocarbons } are acetylene , ethylene , propylene , propane , n butane , iso butane , the n butylene isomers and the various iso butylene isomers
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