The simplest instance is ideal load of bilateral constraints, which means that there is only ideal constraint force during load.
变结构系统理想化处理的方法之一，是把变结构问题看成约束的加载或解除，其中最简单的情况是双面约束的理想加载。
The simplest instance is ideal load of bilateral constraints, which means that there is only ideal constraint force during load.
变结构系统理想化处理的方法之一，是把变结构问题看成约束的加载或解除，其中最简单的情况是双面约束的理想加载。
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