When the control handle is placed in the DN position, the gear doors open, the gear unlocks and extends and the gear doors close.

A. If abbreviations have special meanings, they may be used.

B. Abbreviations should not be used if they are universally meaningful.

C. Only use abbreviations whose meanings are generally recognized.

A. Compressed air will push contamination into the display unit.

B. The display unit will be contaminated by compressed air.

C. Air pressure will push the dirt into the display unit.

A. Upon designed and approved, a complete maintenance procedures must be established. This procedure must provide in clear, easy language to people who need it.

B. Upon design and approval, the establishment of complex maintenance procedures is a must. This procedure must provide a clear, precise language to those who need it.

C. Once designed and approved, the establishment of thorough maintenance procedures is a must. This procedure must be available in clear, concise language to those who need it.

A. So, you＇d have to note down short sentences in simple sentence structures.

B. Thus, you have to write shortly and use simple sentences.

C. Therefore, you must write short sentences and use simple sentence structure.

A. “紧急程序”应该用红色塑料封袋装载以便区分。

B. “紧急程序”应该是由红色塑料板做成分隔页。

C. “紧急程序”应有一个红色塑料分隔标签。

A. AIRBORNE AUXILIARY POWER UNITS are those power plants (engines) built-in on the aircraft for creating and supplying power in a single type or combination of auxiliary electric, hydraulic, pneumatic or other power.

B. AIRBORNE AUXILIARY POWER UNITS are those units (engines) that are suspended on the aircraft for bringing and providing power in a single manner or combination of auxiliary electrical, hydraulic, pneumatic, or other power.

C. AIRBORNE AUXILIARY POWER UNITS are those airborne power plants (engines) which are installed on the aircraft for the purpose of generating and supplying a single type or combination of auxiliary electric, hydraulic, pneumatic or other power.

A. Turn the adjuster clockwise to increase 60 Deg.

B. Turn the adjuster counterclockwise in increments of 60 Deg.

C. Decrease 60 Deg. to turn the adjuster counterclockwise.

A. Exhale into the oxygen mask.

B. Breathe into the oxygen mask.

C. Breathe into the gas mask.

A. Visually check the forward engine mount to the fan frame bolts if they are correctly installed and damaged.

B. Do a visual check of the bolts which attach the forward engine mount to the fan frame for the correct installation and damage.

C. Visually check the correct installation and damage of the forward engine mount to the fan frame bolts.

A. 拆下螺栓和止动块。

B. 拆下螺帽和挡板。

C. 拆下螺钉和螺帽。