B737 Classics: Each generator supplies its own bus in normal operation and can also supply essential loads of the opposite side bus system when one generator is inoperative.

波音737经典：每台发电机在正常运行提供了自己的总线和一台发电机不起作用时，还可以提供对面总线系统的基本负载。

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B737-NG: Each generator supplies its own bus in normal operation and can also supply essential loads and non-essential loads of the opposite side bus system when one generator is inoperative.

波音737经典：每台发电机在正常运行提供了自己的总线和一台发电机不起作用时，还可以提供对面总线系统的基本负载。

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Bus line is the centrum of power system, whether it reliable directly influences system safe operation.

母线是电力系统的中枢，它的可靠与否，直接影响系统的稳定运行。

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Mr Wechlin said that besides pure convenience, the system also significantly increases the time the bus can remain in operation as it does not need to go to the depot every few hours for recharging and there is no need to swap batteries.

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