In accordance with specific conditions, the paper discusses the practical work of quality assurance in a basic environmental monitoring station at county level.
本文根据县级环境监测站的实际情况，从外部和内部两方面因素出发，讨论了开展质量保证工作的具体作法。
Heat boundary conditions of hot rolling work rolls are analyzed and the practical temperature field model is established.
边界热交换系数的确定是热轧工作辊高精度温度场计算的关键参数。
Also, the small shock waves exit in the jet under the practical operation conditions because it is hard for the jet to perfectively work in the design conditions.
在实际的操作环境下，很难做到完全满足喷孔的设计条件，产生了微弱的斜激波。
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