This paper introduces existing problem of original coarse coal mire retrieving system, puts forward improving way. Effect is good after improved.
介绍了原粗煤泥回收系统存在的问题，提出改进措施，改造后效果很好。
This paper points out strengthening input is an effective way of improving listening effect and puts forward some measures of language input and culture input.
有效输入包括语言输入及文化输入，加强输入是提高听力效果的有效途径。
It analyzes the transient effect of frequency step of DDS on the PLL output response, and puts forward a corresponding improving way.
分析了DDS频率阶跃对于PLL输出响应的瞬态影响，并且给出了相应的改善方法。
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