强化的趋势迅速冷却，有必要制定预热来消除冷金属淬火效果，并减少冷却速率。
A tendency to harden by rapid cooling necessitates the use of preheat to remove the quench effect of cold metal, and to reduce the cooling rate.
本文首先研究了AMR声码器的算法，AMR声码器主要由多速率语音编码器、源控速率方案和错误消除机制三大部分组成。
First the paper studies the algorithms of AMR speech coder. The AMR speech coder consists of the multi-rate speech coder, a source controlled rate scheme, and an error concealment mechanism.
它们还具有误差消除电路中使用高转换速率和带宽。
They also feature higher slew rate and bandwidth for use in error cancellation circuits.
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