590、该规范给出了继电器、二极管和系统其他部件的符号。

The specification gives the symbols for relays, diodes, and other parts of the system.

The specification gives the requirement for markings on relay, triode and other parts of the system.

The specification excludes symbols for relays, diodes, and other system parts.

正确答案：A

898、方向舵是一个被固定在垂直安定面上的可移动的翼面,它用于偏航控制。

897、持续适航方案检查号也显示在页面底部,是 CAP 节号。

896、不要让压力小于或大于 30psi,

895、不要操作刹车来降低蓄压器中的压力。

894、泵安装在液压马达后面。

893、When the spring compresses,the valve opens

892、When a fire starts, the temperature increases and causes the detector to operate.

891、Use proper equipment to do the inspection, instead of visual check.

890、Transfer of hydraulic fluid between hydraulic system A and B is caused by improper operation of system controls or wornequipment.

889、To get the correct clearance,add special shims,as necessary.