双色球红蓝走势图

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石墨坩埚的主要特征

发布时间:2019-11-08 15:29:12 浏览:93次

双色球红蓝走势图    

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石墨模具|石墨棒|石墨坩埚

    一般坩埚可分为石墨坩埚、粘土坩埚和金属坩埚三大类。在石墨坩埚中,又有普型石墨坩埚与异型石墨坩埚及高纯石墨坩埚三种。各种类型的石墨坩埚,由于性能、用途和使用条件不同,所用的原料、生产方法、工艺技术和产品型号规格也都有所区别。


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