991. 清洁轮子后用压缩空气吹干。

When wheel is dried, clean with the compressed air.

When wheel is cleaned, dry with the compressed air.

When wheel is cleaned, dry with the impressed air.

正确答案：B

设备系统操作理论翻译

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2372. A modular engine construction is used on all modern aircraft

2371. Lubricate the threads of the two bolts with a small quantity of oil

2370. 遵守工作程序。

2369. 通过视窗能更好的看油液高度

2368. 要指出的是,在对飞机进行任何改装之前,都应该先与联邦航空局联系,以确保飞机的适航性不受影响。

2367. 在隔离活门上贴请勿操作"的标签。"

2366. This method is recommended as minimizing errors of distribution, and also informs owner of the availability of systems and equipment

2365. 确保襟翼缩回,井且副翼配平手轮位于零位

2364. Turn the control to the fully closed position

2363. Recheck the assembly filter for leakage