Impurity in raw and auxiliary materials, pollution in smelting casting process and abnormally purified treatment are the reason of forming inclusion.
原辅材料中的杂质、熔炼铸轧过程的污染及净化处理不当是形成夹杂的原因。
The forming process and significance of laser speckle is analysed, it is reported that laser speckle techniques are applied to detect the impurity in infusion drugs.
本文分析激光散斑的形成和意义，并且报导了利用散斑斑纹检测大输液药品杂质含量的实例。
Finally, we find out the reason for impurity forming and the resource of non-free Cl in industry-grade products.
找到了工业性晶须产品中杂质形成的原因之一及非游离氯的来源。
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