More specifically, {HEAD ~ the present invention} relates to {TAIL ~ a process} for cracking hydrocarbons to produce olefinic gases using improved reactor furnace tubes, such as by reducing the catalytic coking that occurs with the use of conventional tubes, and at the same time, significantly improving product yields 
More specifically , { HEAD ~ the present invention } relates to { TAIL ~ a process } for cracking hydrocarbons to produce olefinic gases using improved reactor furnace tubes , such as by reducing the catalytic coking that occurs with the use of conventional tubes , and at the same time , significantly improving product yields
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