水盐体系组分数计算公式的一个条件

A Limited Condition of the Component Number Famula in Salt-Water System

给出了水盐体系组分数计算公式（ｃ＝ｍ＋ｎ）的一个证明。

This paper has given a proof of the famula c=m+n,which has been used to calculate the number of components in the salt water system.In the proving process,a limited condition(R'=0)of the famula has been found.