The technology of pack boronizing with precoating re layer is studied.

研究了预涂稀土涂层固体粉末渗硼工艺。

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The present invention relates to a solder paste composition used for precoating an electrode surface with solder.

本发明提供一种钎焊膏组合物，该组合物可应用于电极表面预涂钎料。

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This article expounds the influences from the aspects of precoating photosensitiser coating and drying process on the quality of diazo paper.

本文以予涂，感光液涂布及干燥三方面工艺论述对晒图纸质量的影响。

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