美国航空航天巨头RTX正推进一套可用于支线涡桨客机的混合热/电推进系统，目标是在无需更换机体的前提下，为现役飞机带来电动化效率提升，并显著降低燃油消耗和维护成本。
| |-- source: OOOOOO
，更多细节参见新收录的资料
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‘Officers and stewards faced with hostility and violence’
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In tandem with Game Day Vision, the Premier League club are improving the matchday experience for supporters with a variety of conditions
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