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。
Ethylene and catalyst materials such as reaction under certain conditions, and then get polyethylene or PVC removing impurity, purification, melting add pigment, forming is completed.
乙烯和催化剂等原料在一定条件下反应得到聚乙烯或者聚氯乙烯，然后除杂，净化，熔化加颜料，成形就完成了。
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。
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