本文给出的符号适用于所有飞机底层货物装卸系统以及主甲板系统。运输、引导、约束、动力驱动装置和整个货物装卸系统的自动化程度可以使用符号来描述。每个货物符号由一个代表基本功能的基本符号组成。它描述的是部件功能，而不是详细设计和制造方法。

The symbols given herein are applicable to all aircraft cargo-handling systems for underfloor as well as for main-deck systems. The conveyance, guidance, restraint, power drive unit and the degree of automation for the total cargo-handling system can be depicted using the symbols. Each cargo symbol consists of a basic symbol, which represents basic functions. It characterizes a component function, but not the detail design and manufacturing method.