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What are the differences between 33 and 51 expansion glass Mar 30, 2012 · Clear glass of first hydrolytic class is divided into two categories: “33 expansion” (Type 1, Class A) and “51 expansion” glass (Type 1, Class B). The indicated lower expansion coefficient of 33 implies that this harder clear glass has to be processed at higher temperatures when manufacturing auto sampler vials. laboratory 33 expansion borosilicate clear glass HPLC vials Mar 22, 2020 · Type I glass has the least pH ...

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