Other recent accomplishments include expanding the ceiling envelope to 14,000 feet, flight testing with external weapon stores.

近期完成的其他测试还包括14000英尺高度飞行，携带外部武器载荷进行飞行测试。

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Inside the aircraft cabin, circuit systems on the ceiling and dashboard in the flight deck have been installed.

在机舱里面，天花板上的线路和驾驶舱的仪表盘也都已经安装完毕。

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Access is provided from a long, straight, two flight staircase in the preserved ceiling section.

通道在隐藏的夹层部分提供了一条长长的，笔直的双向楼梯。

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After various tests on the virtual prototype (such as making sure vital systems are insulated from lightning strikes), its ceiling, rate of climb and other handling characteristics are fed into a flight simulator.

ECONOMIST: Manufacturing technology