By means of the examination and the analysis on the medium heavy plates with black line, the origin of black line at the cutting end of the medium heavy steel plates are found out.
通过对有黑线的中厚钢板进行相关的检验和分析，弄清中厚钢板剪切端面黑线的形成原因。
The origin of the usual siliceous stone in float glass was discussed on the basis of petrographic examination and its formation mechanism analysis. A solution to this kind of stone was proposed.
通过对实际生产中各种常见硅质结石缺陷的岩相鉴定及生成机理分析，对该类结石来源进行探讨，并提出解决的办法。
The origin of the usual siliceous stone in float glass was discussed on the basis of petrographic examination and its formation mechanism analysis. A solution to this kind of stone was proposed.
通过对实际生产中各种常见硅质结石缺陷的岩相鉴定及生成机理分析，对该类结石来源进行探讨，并提出解决的办法。
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