The effect of rolling oil foaming on product quality in the rolling process of cold rolling aluminum sheet strip was discussed.

通过分析冷轧铝板带材轧制过程中轧制油起泡对产品质量的影响，阐述了轧制油起泡的原因，并提出了针对轧制油起泡的对策。

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Trimming of the edges of sheet strip to make them parallel. This done at either the stainless steel mill or at the stainless steel processor.

对薄板的边缘进行修边以使两边平行。此工艺可在不锈钢工厂或不锈钢加工者处完成。

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Try the technique before you buy with a DIY alternative. Roll a sheet of black card into a cone and place a strip of black or gaffer tape along the seam to hold it securely in place.

在买之前先自己DIY一个，把一张卡纸卷成圆锥型，用电工黑胶粘牢。

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Seeing the drawing in person, one is confronted with its fragility and physicality: The sheet comprises two pieces of paper, glued together with a strip that runs right through the center.

WSJ: Masterpieces on a Shopping List | Michelangelo Master Drawings | Museum of Fine Arts Boston | By Cammy Brothers