指定这些数量。未就尺寸规定继电器的特定型号，但对每个单独范围内可能包含的变量数量提出了限制。概述了与这些继电器的机械和电气结构相关的基本规范以及基本使用环境条件。

Specifies these quantities. Does not specify a particular model of relay as regards dimensions, but proposes limits for the number of variants which may be included in each individual range. Gives a general view of the basic specifications relating to mechanical and electrical construction of these relays and of the basic service environment conditions.