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Continue to ChatPW works toward 10% fuel efficiency gain for 2020's GTF https://leehamnews.com/2014/06/16/pw-works-toward-10-fuel-efficiency-gain-for-2020s-gtf/
PW works toward 10% fuel efficiency gain for 2020's GTF https://leehamnews.com/2014/06/16/pw-works-toward-10-fuel-efficiency-gain-for-2020s-gtf/