The APU usually takes its fuel supply from the LH engine-feed line, but when the cross-feed valve is open, the RH engine-feed line can also supply the APU with fuel.
APU通常从左发动机供油管路获得燃油，如果交输活门打开，右发动机供油管路也可以供应apu燃油。
The APU usually takes its fuel supply from the LH engine-feed line, but when the cross-feed valve is open, the RH engine-feed line can also supply the APU with fuel.
APU通常从左发动机供油管路获得燃油，如果交输活门打开，右发动机供油管路也可以供应apu燃油。
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