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4)	Crude+oil+known+as+petroleum+is+a+naturally+mixture+of+hydrocarbons+C5-C15These+paraffins+can+be+normal+paraffins%2C+iso-paraffins+(branched+chain+paraffins)%2C+alkyl+paraffins%2C+naphthene%27s+(cycloparaffins)%2C+alkylbenzene+and+nuclear+aromatics
5)	keybak
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8)	smart+pellets
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