Those flights often were done in a two - engined Lockheed 12 airplane.这些航班往往是做一两个引擎洛克希德12飞机.Piston - engined aircraft and turboprops have air compressors to maintain cabin pressure.活塞发动机和涡桨发动机的飞机有压气机来控制客舱的压强....a petrol-...
When refuelling petrol - engined units petrol does not spill onto hot surfaces.当加油汽油装有引擎的单位汽油不溢出热表面.Those flights often were done in a two - engined Lockheed 12 airplane.这些航班往往是做一两个引擎洛克希德12飞机.Piston - engined aircraft an...