咬缝：由上下层衣片咬住中间一层衣片，正面缉明线。用于装袖头、腰头等。
The bite: from the middle upper and lower garment pieces into a layer, positive topstitching. For the first, waist cuff.
咬缝：由上下层衣片咬住中间一层衣片，正面缉明线。用于装袖头、腰头等。
The bite: from the middle upper and lower garment pieces into a layer, positive topstitching. For the first, waist cuff.
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