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[72] 联合循环发电机先是燃烧天然气，驱动一组涡轮，之后利用高温产生蒸汽，驱动另一组涡轮。
[73] Jevons，S.1865.The Coal Question：An Inquiry Concerning the Progress of the Nation，and the Probable Exhaustion of our Coal-mines.Macmillan，p.103.
[74] Edison in 1910，引自Collins，T.and Gitelman，L，Thomas Edison and Modern America.New York：Bedford/St Martin’s，2002，p.60.Source：Bradley，R.J.2004.Energy：the Master Resource.Kendall/Hunt.
