Bust dart seam allowance must be ironed upward.

胸折止口要烫向上面.

The width of the seam allowance used determines the width of the welt.

留出缝份,缝份的宽度根据贴边的宽度而定.

Cut this out on the cross from sew - in interfacing piece on the jacket front seam allowance.

用预先做好衬斜裁,其后把布放在前身缝份上.