Scratches can prevent the free movement of the piston in the sleeve.

利用简化的原理图和图纸来解释系统的操作方法，包括使用过程中的警告装置和控制特点。

A. Use schematics and drawings to briefly explain the operation of the system, including warning devices and control features during use.

B. Making use of simplified schematics and drawings explain how this system operates, including warning devices and control features in use.

C. The simplified diagrams and drawings are the indication of the system operation, including warning devices and control features in use.

This figure shows the structure of the system.

A. 该数字表明了系统的规模。

B. 该图片显示了系统的结构。

C. 该形状说明了系统的形式。

Install the valve and the correct gasket.

A. 安装活门和正确的垫圈。

B. 安装阀门和对应的封圈。

C. 安装接头和相应的垫片。

大翼防冰“L VALVE OPEN" 或“R VALVE OPEN" 灯保持在蓝色明亮。大翼防冰活门则没有在指令位置。

A. A wing anti-ice L VALVE OPEN or R VALVE OPEN light stays illuminated dim blue. The wing anti-ice valve is not in the ordered position.

B. A wing anti-ice L VALVE OPEN or R VALVE OPEN light stays illuminated bright blue. The wing anti-ice valve is not in the commanded position.

C. A wing anti-ice L VALVE OPEN or R VALVE OPEN light stays illuminated dim blue. The wing anti-ice valve is not in the preferred position.

Only apply very light pressure to the surface.

A. 只对表面申请很轻的压力。

B. 只传导很轻的压力到表面。

C. 只对表面施加很轻的压力。

Examine the seal for defects.

A. 检查密封件是否有缺陷。

B. 检查封胶是否有缺损。

C. 检查封严是否有缺失。

The usual control for the left pack makes sure that it supplies air at a temperature that gives the necessary cooling for the flight compartment.

A. The usual control for the left pack ensures that it supplies air at a temperature. The temperature gives the occasional cooling for the flight compartment.

B. The normal control for the left pack makes sure that it supplies air. The cooling provides the necessary temperature for the flight compartment.

C. The usual control for the left pack assures that the temperature of the supplied air will provide the control cabin with the needed cooling.

此文件包含持续适航的适当指令。

A. This documentary includes appropriate instructions for continuing airworthiness.

B. This document contains appropriate instructions for continued airworthiness.

C. This document covers proper orders for continuous airworthiness maintenance program.

Deactivation/Reactivation procedures for circuits, systems, units, etc., shall be included. This is important because during maintenance, certain components may need to be deactivated for safety reasons or to prevent damage to the aircraft or equipment. It is also important to have instructions for reactivating these components once maintenance is complete to ensure that they are functioning properly and do not pose a risk to the safety of the aircraft or its occupants.

A. 停用/重新启用电路、系统、组件等的程序应包括在内。这是因为在维护过程中，由于安全原因或为防止对飞机或设备造成损坏，某些部件可能需要停用。同样重要的是，一旦维护完成，需要有重新启用这些部件的说明，以确保它们正常运行，不会对飞机或机上设备的安全构成风险。

B. 停用/重新启用电路、系统、组件等的程序应包括在内。这是因为在维护过程中，由于安全原因或为防止对飞机或设备造成损坏，某些部件可能需要停用。同样重要的是，一旦维护完成，需要有重新启用这些部件的说明，以确保它们工作正常，不会对飞机或机上人员的安全构成风险

C. 停用/重新启用管路、系统、组件等的程序应包括在内。这是因为在维护过程中，由于安全原因或为防止对飞机或设备造成损坏，某些部件可能需要停用。同样重要的是，一旦维护完成，需要有重新启用这些部件的说明，以确保它们工作正常，不会对飞机或机上人员的安全构成风险

One of the cautions on mooring: THE LAST FEET OF ALL TAXIING AND TOWING OPERATIONS MUST BE IN A STRAIGHT LINE. THIS IS TO PREVENT FORCE ON THE TIRES AND THE MAIN LANDING GEAR.

A. 系留操作中的警戒之一是：所有的滑行和拖动操作的最后几英尺必须是一条直线。这是为了防止对轮胎和主起落架施加力量。

B. 系留操作中的警戒之一是：所有的滑行和拖动操作的最后几英尺必须用一条直线。这是为了防止对轮胎和主起落架施加力量。

C. 系留操作中的警戒之一是：所有的滑行和拖动操作的最后几英尺必须走直线。这是为了防止对机轮和主起落架施加力量。