| 摘要 |
A fuel supply system for a gas turbine engine comprises a first positive displacement pump ( 16 ), a second positive displacement pump ( 27 ), said first and second positive displacement pumps ( 16, 27 ) being operable simultaneously for the supply of fuel from a low pressure source, and switching valve means ( 14 ) downstream of said first positive displacement pump ( 16 ) for changing a connection mode between said first and second positive displacement pumps ( 16, 27 ) between a series mode and a parallel mode.
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