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WASHINGTON, March 10 (Reuters) - The selection of Pratt & Whitney to build the engines for the new **rthrop Grumman Corp B-21 bomber should help Pratt lower the cost of its F135 engines that power the Lockheed Martin Corp F-35 fighter jet, a top Air Force general said Thursday. ![]() ??????? ??????: UPDATE 1-U.S. F-35 chief expects savings after Pratt?s B-21 bomber win || ??????: ahlam1399 || ??????: اسم منتداك
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