The main cause is that the limitation of the condition of equality in metal flowrate has no been broken through.
分析其原因，主要是在控制器设计上未能突破秒流量相等条件的局限性。
Chemistry milling is a method of part forming in definite solution under the certain condition, which is easy control and equality allowance.
化学铣切成型是将零件置于一定的化学溶液中，在特定条件下，对零件腐蚀加工成型的工艺方法。
A discrete variable structure composite control strategy which use an equality form of the reaching condition is proposed and applied to design the load_frequency controller.
提出了一种等式到达条件下的离散变结构组合控制策略，设计了基于该控制策略的负载频率控制器。
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