Keep the rough edge of the fabric aligned with the raw edge of the piping.将织物的毛边与滚边未经加工的边对齐。The red dress had slim black piping around the neck.这条红裙的领口有细细的黑色滚边。Each dress is beautifully finished off with piped seams and fitted underskirts.每件连衣裙在最后用滚边接缝并配上合身的衬裙，变得非常漂亮。