Noise suppressor is that portion of the system which reduces the noise generated by the exhaust gases.

A. 用于乘客和机组人员进出飞机的门，包括结构件、闩锁机构、把手、内衬、扶手、坡道、操纵装置等物品。

B. 用于乘客和机组人员进出飞机的门，包括结构件、闩锁机构、把手、内衬、综合步骤、坡道、扶手等物品。

C. 用于乘客和机组人员进出飞机的门，包括结构件、门闩、把手、隔热材料、衬板、控制器、踏板、坡道、扶手等。

A. Connect the cover immediately.

B. Attach the cover temporarily.

C. Install the cover permanently.

A. For more information, refer as official reference books.

B. For more information, refer to official reference books.

C. More information referred to official reference books.

A. 用螺母将面板固定在支架上。

B. 用螺栓将面板固定在结构上。

C. 用螺栓将面板固定在支架上。

A. Put a plug on the open end of each pipe.

B. On the opening of each pipe, put a cover.

C. Put a cover on the loose end of the pipe.

A. All of the top vertical mounting struts are adjustable except the primary mount struts unless they are repaired or replaced. The spare vertical strut (left forward ) and the side strut (right forward) may require adjustment during APU replacement.

B. All of the vertical primary mount struts at the top are adjustable. However, adjustments to the primary mount struts are not required unless a strut is repaired or replaced. The redundant vertical strut (forward left) and the redundant side strut (forward

C. The top of every vertical main retaining struts is adjustable. However, adjusting the main mount strut is not allowed if the strut is not repaired or replaced. During APU replacement, it may be necessary to adjust remained vertical strut (left anterior) a

A. If the scratch does not go through the protective layer, the unit is serviceable.

B. If the nick does not go through the primary surface, the unit is serviceable.

C. If the scratch does not go through the protective surface, the unit is movable.

A. 可以通过使用抹布沿钢索擦拭的方法，实现对钢索关键疲劳区域的仔细检查。

B. 可以通过沿电缆缠绕碎布的方式来对电缆关键疲劳区域进行仔细检查。

C. 在钢索严重疲劳区域进行近距离检查，可沿钢索用棉布清洁。

A. Use protective goggles when you do work on fire extinguishers.

B. Ensure that you wear protective clothes while performing tasks on fire extinguishers.

C. Use protective gloves when working on fire extinguishers

A. If you find break wires, repair them.

B. If you find broken wires, repair them.

C. If you find break wire, repair them.