Press the seam open and carefully align the underlay before pinning the right sides together.
正面合在一起之前，先将缝线烫开并仔细地将缝的粗缝线。
Press seams open using a seam roll. For hard-to-reach seam allowances on collars and lapels, press them open over a point presser.
然后用袖烫垫烫开缝线。领子与驳头上难以烫到的缝份，用小烫板烫。
Press seams open using a seam roll. For hard-to-reach seam allowances on collars and lapels, press them open over a point presser.
然后用袖烫垫烫开缝线。领子与驳头上难以烫到的缝份，用小烫板烫。
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