You can put all of them in a single class or interface (to centralize all of your message definitions in a single location), or you can place these constants in the classes where they are used.

可以将它们放在单独的类或接口中(将所有消息定义集中到一个地点)，也可以放在使用到它们的类中。

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In existing fault location algorithms the parameters of power transmission line are regarded as known constants, so the accuracy of fault location depends on that of the value of parameters.

在现有的故障测距算法中，输电线路参数都是作为已知恒量参与运算，其准确性是影响测距精度的一个重要因素。

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