1. All kinds of fabrics have lengths and widths. The length parallel to the fabric is called piece length.
2. The direction of piece length is the radial direction of the fabric, and the yarn used in the radial direction is called warp.
3. The thin length perpendicular to the edge of the cloth is called its width, and the direction of the width is the weft direction of the fabric. In weaving, the yarn used in the direction of the weft is called the weft.
