When you assign one structure variable to another, or pass a structure instance to a procedure argument, the current values of all the variable elements are copied to the new structure.

当将一个结构变量赋给另一个，或将结构实例传递给过程参数，所有变量元素的当前值都复制到新结构中。

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Steel angle is a general purpose pass, used in all kinds of steel structure, therefore its use scope is extremely widespread, and holds a greater proportion in the steel products production.

角钢是一种通用型钢，用于各种钢结构中，因此使用范围非常广泛，在钢材生产中占有较大的比重。

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