To prevent ridge marks on the surface of the garment left by the seam allowance on straight or curved edges of necklines, collars, and cuffs, the seam allowance is graded by trimming it in layers.是什么意思_To prevent ridge marks on the surface of the garment left by the seam allowance on straight or curved edges of necklines, collars, and cuffs, the seam allowance is graded by trimming it in layers.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句