948、Most of the switches you use to control the electrical power system are on the electrical system controlpanel. 大多数用来控制电力系统的开关都在电力系统控制面板上。

540、If an engine fire detection system is available. describe, give principle of operation, and explain how to use it.

539、If a supply shutoff valve was closed for less than five minutes no maintenance is required and shutoff periods are notaccumulative.

538、If a company publication style manual is used, the format and layout should follow this Specification to the extentpracticable

537、Identify the wires with sleeves of different colors.

536、Identify sections that can cause specific types of trouble

535、However, the systems are independent and there is no fluid, exchange between them.

534、Hold the cylinder tightly.

533、Head aircraft into the wind.

532 、Handbooks shall be readily revisable. They may be thin loose-leaf from, with durable, multi-ring cover, or permanentlybound.

531、Get medical aid immediately.