Good dishes should be better light transmission and no impurities.
好的器皿应该透光性较佳且无杂质。
No impurities, such as residual chemical agents and oxides were detected by XRD analysis.
XRD分析没有检测到诸如残余化学试剂和氧化物之类的杂质。
No impurities. In the course of production and processing, is a set of strict production process and quality standards.
无杂质。在生产和加工过程中，更是有一套严格的生产工艺和质量标准。
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