design symbol meaning in English

图示符号

Design symbols for heating , ventilation and air conditioning in petrochemical industry
石油化工采暖通风与空气调节设计图例
Design information modelling is an important problem in engineering design . aimed at the shortage of information description of multi - types & complex pipeline system design and management in 2d environment , a dynamic modelling method for design and management information based on the object encapsulation is firstly presented in this chapter by defining all sort of design symbols in object . following , the encapsulation models of different kinds of design symbols are designed distinguishingly in terms of their functional characteristics
通过引用对象概念对各种设计符号进行定义，提出了基于图形实体对象封装的动态信息建模方法，并根据多类型复杂管线系统规划布置中使用的不同功能符号的特点，分别建立了不同类型符号的封装信息模型，同时设计了面向多类型复杂管线系统规划信息管理的对象-关系模型映射机制。