本文介绍了大型箱型钢结构井架的制作方法及质量控制要素。

The article describes the fabrication methods and quality control factors on Heavy Box-Type Steel Headframe.

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介绍了铝电解电容器负极用素铝箔的种类及其特征，阐述了其加工制造过程中的质量控制要素。

Introduced variety and character of negative native aluminum foil using electrolyze capacitor, and expounded quality control keys for producing process, too.

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介绍了涂层钢板的生产工艺、关键生产技术、设备以及涂层钢板所用涂料和覆膜，同时对涂层钢板生产过程中的质量控制要素进行了分析。

It is introduced its production process, key technique and equipments as well as the paint and covering-film used for it. The main quality control factors in production are analyzed.

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