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Curvature in a film that has been stored at an improper humidity.
An up-and-down wrinkle on the surface of a metal bar or sheet.
1. Distortion of the surfaces of a beam or girder under load; caused by unequal distribution of weight, temperature, or moisture, or the lack of uniform texture.
2. Distortion of the surface of a sheet of material, such as a bulge or wrinkle in asphalt prepared roofing.
3. A brotch.