Several elastic bands for various purposes: 1. Reinforced elastic band (reinforced adagio): strong elasticity, used for mobile phone bags. 2. Ling-woven elastic band: strong elasticity, often used for pen inserts in pockets, inner belts, etc. 3. Twill elastic band (single oblique, double oblique): The elasticity is loose, and it is often used in products with low quality requirements. 4. Wide…