Existing analyses were reviewed to identify components and areas that may have exhibited lower margins of safety.

A. 连接电源时，不要打开房间。

B. 连接电源时，不要打开房门。

C. 连接电源时，不要打开壳体。

A. 调整电位计，直到听不到扬声器的嗡嗡声。

B. 调试势能表，直到听不到扬声器的警报。

C. 调节电压表，直到你听不到话筒的声音。

A. The section of the engine system which contains the turbine shafts and reduction gears.

B. The section of the engine system which contains the propeller shafts and reduction gears.

C. The section of the engine system which contains the connection shafts and reduction gears.

A. The pump is installed behind the hydraulic motor.

B. The gearbox is installed behind the pneumatic motor.

C. The hydraulic motor is installed behind the pump.

A. 用米尺来衡量金属盒的容积。

B. 评测金属规则的维度，来作长远的分级。

C. 用一个带有毫米刻度的金属尺来测量尺寸。

A. Pull out the circuit breaker.

B. Push in the circuit breaker.

C. Remove the circuit breaker.

A. 这些组件和部件用于在整个发动机内分配滑油，包括前后增压和回油泵、油槽、油滤、阀门等，还包括第79章中未涵盖的管路。

B. 用于在整个发动机中分配燃油的装置和部件。包括前后压力和清除器泵、集水坑、粗滤器、阀门等。还包括第79章中未包含的软管油管。

C. 用于在整个发动机中分配机油的装置和部件。不包括前后压力和清除器泵、集水坑、粗滤器、阀门及第79章中未包含的软管油管等。

A. Make sure that chemical compound are not near the engine nozzle.

B. Make sure that solvents are not near the engine exhaust.

C. Make sure that there＇s no isopropyl alcohol near the engine exhaust port.

A. During the operation, please be careful not to pierce the hydraulic oil tank.

B. During the operation, pay attention not to punch the hydraulic reservoir.

C. During the procedure, take care not to puncture the hydraulic reservoir.

A. 第11和12页的图1是53章、54章、55章和57章中规定的典型镀层/表皮图。

B. 第11和12页中的图1是53章、54章、55章和57章中典型的镀层/蒙皮插图。

C. 第11和12页的图1是系53章、54章、55章和57章中规定的典型电镀法/表皮图。