多值开关元件可以像二值开关元件那样用泉设计开关线路。所用的一组开关元件必须能夠实现各种可以由真值表规定的开关函数(即函数的完整性)。对於一组所采用的元件,可以建立一条联系,n个變数函数与n—1个变数函数的展开定理。本文给出了设计线路的方法及例子。从展开定理可以求得实现任何开关函数所需要开关元件数的上限。当采用能实现模代数结合的开关元件时,所得上限为最小。 Multivalued switching elements can be designed like springs with binary switching elements. The set of switching elements used must be capable of implementing various switching functions (ie, the integrity of the function) that can be specified by the truth table. For a set of used components, we can establish a connection, n variable functions and n-1 variable function expansion theorems. This article gives the method of designing lines and examples. From the expansion theorem we can find the upper limit of the number of switching elements needed to achieve any switching function. When using switching elements that enable modular algebraic combination, the upper limit is minimized.